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Ranking the Best Marine Radar Systems of 2024

Raymarine RD418HD HD Color Radome

Raymarine Quantum 2

Furuno Defender

Marine radar used to be a pipe dream for most boaters. A cool sounding gadget, but totally impractical. How could any regular boater use it? Why would they ever want to? It was for commercial freighters and ocean liners. But you can’t stop progress. These days marine radar has come home. There are plenty of small, portable, affordable units.

Radar is one of the greatest inventions ever in terms of boat safety. Navigating in rough seas and fog was far more treacherous before it came along. Now, with radar, a clear path can always be found. Unseen obstacles and oncoming vessels need not be a danger or a surprise.

If you’re a serious boater, you want to have the best marine radar you can get. But what makes for the best marine radar? Let’s take a look at some of the best marine radars on the market. Then we’ll go over what features you need, and why you need them.

With a range of 48 nautical miles, the Raymarine Color Radome operates on 4 kW of power. This kind of radome antenna operates on plug and play technology. It’s easily compatible with a lot of other hardware. Compared to the typical 24 nautical miles, this has a great range.

The Raymarine color radome scanner features an adaptive digital receiver. That means you’re going to have a clear picture no matter what. It easily adjusts to changing weather and sea conditions. It also takes environmental changes into effect quickly and easily as well.

The multi-level target display operates in 256 colors. It even features a bird mode. That means it can detect a flock of birds at a distance. Why is that important? It can show you where a school of fish is that the birds are feeding off of. That can save a lot of time hunting down fish . Just let the gulls and pelicans do it for you.

Dual range mode lets you scan near and far simultaneously. At 21 pounds, it’s not an overly huge unit, either. That means this is ideal for a smaller boat. It features everything you want in a compact shell. It won’t stand out and look awkward on your boat, either.

For the features and the price, Raymarine has hit it out of the park with this marine radar.

$2,099.99 Amazon  →

The Raymarine Quantum marine radar is definitely at the head of the class. It will set you back more than the RD418HD but it’s worth it. It features CHIRP pulse compression and Doppler collision avoidance. Raymarine’s advanced tech can instantly highlight moving radar contacts. Once it does, it can color code them for easy tracking at a glance. It will tell you if they’re coming towards you or moving away.

In high-traffic areas, Raymarine’s Quantum takes a lot of guesswork out of navigating. A quick glance can let you know what’s a potential danger. At the same time, it shows you what’s moving away.

Raymarine’s Quantum also features MARPA tracking. This is used by the U.S Coast Guard. It keeps an eye on dangerous targets. That way you can avoid collisions.

Additional features include TrueTrails target history. This can show you the path other vessels have taken. The CHIRP pulse compression can show you anything even in the thickest fog. And it can identify it as close as 18 feet away.

It has a 24 nautical mile range for traffic detection and immediate awareness. That means it’s on and ready instantly.

Installation is easy and the unit is lightweight. Raymarine boasts it’s actually 50% lighter than similar units. All in all, if you want one of the best marine radars and price is no obstacle, give this a try.

• Buy on Amazon   →
• Buy on Walmart   →

With some marine radars costing over $5000, the Furuno Defender is a welcome change. At a fraction of the price, it still offers reliable functionality. The price is definitely not the only bright spot here. For people who don’t want to get too complicated with technology, this is a breath of fresh air. The Furuno Defender can be hooked up to a smartphone.

The 4kW power output gives you a 24 nautical mile range. That makes it ideal for smaller boats and casual sailors.

The Defender operates something called DRS4W radar. It is compatible with all iOS devices. All you need to do is download their app in the app store. It’s free and very user friendly.

Once using the app, you gain a lot of functionality. You can slip between day mode and night mode. Target distance is also available. You are also able to set up a guard zone around your boat. This means that if the radar detects anything within that zone, your phone will alert you.

The unit is sturdy and can handle winds up to 70 knots. You’re also covered in high heat or freezing cold. It’s also sturdy and waterproof to meet all your needs.

 Amazon  →

Garmin GMR Fantom Marine Radar

The Garmin GMR 18HD+ offers great performance at a reasonable price. The power output here is 4kW, and it provides a range of 36 nautical miles. The images are clear and precise. That includes close up as well, with range detection as close as 20 meters from your vessel.

The Garmin GMR has dynamic auto gain. That means even in poor weather you can expect a good image. It can be easily paired with a heading sensor for increased functionality. Hook it up to a multifunction display and you are ready for MARPA tracking. The unit is compact in size so it will fit nicely on any boat. Installation is also fairly easy.

The Dynamic Sea Filter adapts to changing sea conditions. That ensures you don’t lose signal or clarity regardless of what’s going on. Radar images are overlaid on the chart plotter. That means you have improved navigation capabilities.

• $2199.99 Walmart   →

Simrad Halo 20+ Marine Radar

The Simrad Halo 20+ has a range of 36 nautical miles. It uses pulse compression technology and features beam sharpening. The dual range mode lets you see at a distance and also close up. With 60 RPM operation you can see close up almost instantly to 1.5 nautical miles.

The Simrad features VelocityTrack Doppler technology for collision avoidance. This will help you keep track of any hazards on the open water. You can steer clear of other vessels and objects well ahead of time. It operates in several modes. These include harbor, offshore, weather, and bird modes.

It also features MARPA target tracking. This lets you follow 10 targets simultaneously. If you’re using dual range, it doubles to 20.

Unlike some systems, the Simrad is ready instantly. There is no warm up period during which it has to build up. If you plan to stay close to shore, the Simrad Halo may be the best marine radar for you. The speed and accuracy help you identify close range targets. This can be done faster than almost any other marine radar out there.

• $2299.99 Bass Pro   →

Furuno 1815 Color LCD Marine Radar

The Furuno 1815 4kW marine radar features an 8.4 color LCD display. This means you don’t need to worry about having to try to integrate boat radar into your GPS or chart plotter. It’s an ideal unit for fishing boats. Or just pleasure boating. The radome antenna is small and won’t take up a lot of space. The installation is simple and easy to understand. Also, the controls are highly intuitive. Mastering the functioning will not take much time at all.

Details are displayed clearly and in full color on the display. Fast Target Tracking lets you follow up to 10 targets at one time. True Trail mode also displays the path objects are on. It then compiles that data over time so you can see where an object is and how it got there. The range extends up to 36 nautical miles.

 Walmart  →

Things to Consider

Not every marine radar is built the same. There are several factors that can affect which one is best for your boat.

Radar System Range

Marine radars come in different ranges. Think of it like binoculars. Depending on the lens and prism type, some can see a great distance. Others have a much more limited range. So then the question becomes what range do you need and why?

If you’re a casual boater, you may not need any great range. If you tend to stay near shore, a limited range will work perfectly for you. It can still show hidden hazards and vessels in fog.

If you’re interested in more serious boating, a greater range is needed. If you plan to do boating a good distance from shore, this will be helpful. Likewise, if you’re an explorer and want to head to unfamiliar waters. A long range boat radar will eliminate any surprises.

An average range is 24 nautical miles or 26 nautical miles. Even up to 48 nautical miles. 36 nautical miles is rather rare, but it’s a sweet spot in the middle. The best marine radars need to have range plus clarity.

As you can imagine, a more powerful marine radar is typically a better marine radar. A more powerful engine goes faster. A more powerful shower cleans better. It’s just how things work. Power is different from range, although range is definitely affected by power.

A low-powered marine radar will have trouble getting through severe weather and fog. Heavy rain will slow it down as well. These obstructions absorb radar, making it less functional. More power will help it cut through them.

Power for a marine radar is measured in kilowatts (kW). The typical range for a marine radar starts at 4 kW and goes up to about 25 kW. A 4 kW radar has a maximum range of about 48 nautical miles. At 25 kW you’ll get a maximum range up to 96 nautical miles.

There are lowered power marine radars you can get as well. Some down as low as 2 kW. These only have a maximum range of about 24 nautical miles.

The ability of your marine radar to function can be tweaked by more than just power. For instance, a taller antenna can help improve range and power as well.

Types of Marine Radars

Not every boater is aware that marine radars come in different types. They perform the same basic function but operate slightly differently.

Pulse Radar: These are the older style of radar system. They create microwave pulses with high powered magnetrons. It’s rather similar to how a microwave oven works. The pulse are released in short bursts of voltage. Though older, it’s still reliable radar technology.

Solid State Radar: Solid state is the newer style of radar system. It’s also called broadband marine radar. Solid state uses something called Frequency Modulated Continuous Wave technology. This is sometimes abbreviated to FMCW.

Solid state marine radars use less radiation than pulse radar. That’s another thing people don’t often consider. Radar does release energy that could potentially be dangerous. Keep in mind that it’s unlikely you’ll be exposed to a dangerous dose, however. It would take a long time.

Solid state radars are easier to install than pulse. They don’t need to warm up the way a pulse system does, either. They have improved range even using the same power. And they also have a better target resolution.

Most marine radars have a beam width of 5.2°. A narrower beam width is going to provide you with a more detailed image. This is especially true of an object that is far away. It’s like focusing on something with a flashlight beam. But there is a downside. Narrow beam width tends to miss things as well. The narrower your beam, the more likely it is to skip important objects. So you need to have a happy medium. Too wide and resolution suffers as well.

Compatibility

Marine radar systems work in conjunction with other technology. On its own, radar won’t do much, right? You need to see the data it collects on a screen. That means tying it into your GPS or chart plotter.

Some radars come with their own GPS and chart plotter hardware. But most boats will already have a GPS or chart plotter on board. It’s more efficient to tie them together. But you need to make sure your radar actually works with what you have. If not, you’ll need to have some extra technology on board.

Just as with anything else on your boat, you need to settle on a budget for a radar. Even a “cheap” radar is an investment. Some kinds of radar systems can get well over $5000. For that kind of money, you want to make sure you’re getting quality technology.

Cheap radar systems do exist. But never forget that you get what you pay for. If you find a bargain radar, always research it. Check reviews across several sites. Especially if it’s a brand you have never heard of. If you can’t get some reliable history and reviews, you may want to skip it.

Boating Habits

The way that you boat can dictate how you use marine radar system. As we covered, weather can affect how radar systems work. But if you do boating at night, for instance, that has an effect as well. Early morning boating can benefit from high powered radar as well. If you have a fishing boat, you can get a marine radar system that is also a sonar. That way you have the benefit of a fish finder.

Casual boaters will probably just need a simple marine radar system, if they need one at all. But if you’re a real gadget head, then maybe a more intense system is needed.

Choosing the place to mount your radar is as important as the type of radar. If you mount it wrong, it will limit function. Improper mounting makes blind spots. If the radar is obstructed by other parts of your boat, it can render it useless. Your radar should come with a mounting kit. This will always be the best way to mount it. If it doesn’t, you need to do a little homework. Find out the best way to mount your specific model.

At the very least, radar needs to be mounted above the passengers on the boat. This keeps you out of range of the electromagnetism that is being used. You want to look for the highest possible point on the boat. That way the radar can operate at a full 360 degrees.

Waterproofing

Everything on a boat needs to have a degree of waterproofing. That just makes sense. But electronics can be touchy. You wouldn’t want to dunk your GPS or radio, right? The radar is the same way. It needs to be waterproof, however. It’s going to be exposed to sun and surf.

Radar units have specific waterproof ratings. You want something rated IPX6 at least. The IPX scale rates devices based on their water resistance. It runs from IPX0 to IPX9K.

An IPX0 has no water protection at all. At IPX6 it can resist high-pressure, heavy sprays of water. This is ideal for a boat radar. It should be enough to keep it safe in rough seas. It is rare you would find anything above IPX6.

IPX7 means it can be submerged for 1 meter for up to 30 minutes. It is unlikely you would find a radar system that has this rating or above.

Not every radar system is the same size. If you have a small boat, you need a small radar. Not for technology reasons, but for practical ones. Large radar units will be harder to mount if you don’t have the space.

Check the dimensions before you buy. Make sure you have the open space to mount it safely. Likewise, a heavy radar unit could pose an installation and safety issue. Some of these units weigh around 20 lbs. If these are not securely mounted, they could be a danger if a storm tears them free. Mounted in a high space, you don’t need a 20 lb radar hitting you in high winds.

My grandfather first took me fishing when I was too young to actually hold up a rod on my own. As an avid camper, hiker, and nature enthusiast I'm always looking for a new adventure.

Categories : Boats

Shane William Savell on May 25, 2021

Hi, looking for small boat 30foot or do, radars with PI lines. Parallel index lines. Any comments. Cheers. Sav

David L on October 25, 2022

Something for your readers to consider. Will a radar pick up whales in the water. The answer is a resounding no! How then do some radars detect whales. Answer – the same way they all do. They won’t reflect off a whale, they will reflect off the hole in the water a whale makes. This explains why whales come and go on radar. When near the surface they make a “visible” hole in the water. When they dive – they disappear!

The radar horizon for an antenna is about 7nm at sea level and increases to about 12nm for a 100 foot antenna. The power out on a radar is not the critical factor when selecting a product. Your range is obviously extended when detecting targets which are higher than sea level. EG the mast of a merchant ship.

The statement above “The ability of your marine radar to function can be tweaked by more than just power. For instance, a taller antenna can help improve range and power as well.” is misleading, when you say a taller antenna I presume you mean a higher mounted antenna? (A taller antenna in the shape of the reflector would provide no benefit in the marine environment.)Height of the antenna may improve range as described above. It will not provide more power, this is purely a function of transmitter power. For example to double the range of a radar you have to increase the power out by 8 times.

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4 Best Boat Radars – (Reviews & Buying Guide 2021)

Spending time on your boat away from densely populated areas is a great way to relax and recharge. However, you can’t expect the weather to be in sync with you and be beautiful and sunny every time you sail. For days when clouds accumulate quickly, and storms start to rage, you need a marine radar to help you navigate your way back.

The same goes for fishers who like to practice their hobby at night. Investing in the  best boat radar provides an extra layer of safety.

We have prepared some marine radar reviews  and a buying to lessen your burden of searching for a good product. There are some key points and features to consider before making a purchase, and you will find them here. Just keep reading.

Best Boat Radars Comparison Chart

Best Boat Radars Reviews – (Editors’ Choice)

We have compiled our list with no particular order in mind. So without further ado, please take a look at the advantages and disadvantages of the products we tested.

1. Raymarine Quantum Radom

Everything you need to install this system is included in the box. It comes with a power and a data cable, bolts and spring washers, plus the documentation.

• This unit has extended battery life.
• It loads in seconds, so you don’t have to wait long.
• You can use this radar wireless or with a cable.
• The radar can identify small targets with ease, even if they are near larger ones.
• No considerable disadvantages.

2. Furuno LCD Radar

The power consumption of this radar system is about 38W. That is more than other products on our list, but it’s still considered low power consumption. A 33-foot cable comes with the radar, but if you need it longer or shorter, you can contact the seller, and they’ll send you whichever you need. Thus, you will get the ideal setting for your radar installation.

• The monitor has swiveling brackets so you can adjust the angle.
• A feature called True Trail mode allows you to track the movements of other vessels.
• Storms and fogs do not disturb the signal, and it produces clear images.
• The display is waterproof as well as the antennae so you can install it externally.
• No disadvantages.

3. Garmin Radome

The unit comes with cables to connect it to the chart plotter and the battery. Plus, in the package, you’ll find all nuts, studs, and washers. However, depending on where you want to set it up, you may need to purchase mounting brackets.

• Dynamic auto gain and sea filters allow the system to adjust to the surrounding automatically.
• Harsh weather conditions do not disturb the radar’s work.
• You can track up to ten targets with this Garmin radar.
• None that we could find.

4. Lowrance 4G Radar Kit

Overall, this radar is easy to set up and integrate with a display and a GPS. It has a beam sharpening feature that makes target separation a breeze. Plus, the images this system produces are sharp and clear.

• You can follow up to ten targets with this radar.
• It can pick up non-typical targets.
• The radar is instantly on when you set it up, no need to wait for it to warm up and load.
• Low power consumption – only about 1 APM/hour.
• An Ethernet cable isn’t included in the package.

What Boat Radar Do You Need

Whether you need a simpler model or one with many features depends on the frequency and time of your sailing. Ask yourself the following questions: Do you sail at night time? Do you spend long hours or days on your boat? Do you go fishing in unfamiliar areas? Do you use your boat for whale watching? Do you sail in an area that is prone to fogs?

If you answered with “No” to these questions, then you need a radar with just the essential features. However, if you answered positive, then you need a multi-functioning unit for more security.

Using a radar provides an essential layer of safety when sailing. It gives you awareness about your surroundings and other moving objects near you.

Every sailor dreams and hopes for clear skies and excellent visibility, but that isn’t always the case. Good boat radar is your best chance at navigating through a thick fog, at night, or in another situation where your visibility has decreased.

What is Marine Radar? How Does it Work?

The word ‘radar’ is actually an acronym. It stands for Radio Detection and Ranging. Similar to the sound-wave principle, boat radars have a specific principle . Each has an antenna that spins and emits a signal and listens back for it. When the signal reaches an object, it bounces back and reaches the radar. That’s when the radar indicates to you where the object is but not what it is.

Every unit has a different range and target capacity. Some models can detect objects with as much as forty miles or more. Others are better at identifying what is around your boat. Also, some can show only about three or four targets, while others can detect ten or more.

What to Look for When Choosing Marine Radar

Here are the things to consider and features to look out for when deciding on marine radars:

• Size and weight are essential for the size of the boat. When you dedicate a place on your ship for radar and all its parts, make sure the product you buy fits those dimensions. Furthermore, some units can be quite heavy and should be installed on a surface that will support their weight.
• The power of marine radar is the distance you can use it on and how much it can focus on targets. With a powerful enough radar, you are able to see small things from further away. Furthermore, such a unit will not be affected by light weather changes such as rain, fog, drizzle, etc. The standard power consumption for boat radars is from 4 kW to 25 kW. You need to take your battery into account when choosing a radar. For more information about boat batteries, see  our guide on marine battery charges and some product reviews .
• Beamwidth is crucial to choosing the right radar for your boat. Most units have a broadcast range between 1 and 6 degrees. The width of the beam correlates to the minimum target width. That means that the narrower the beam is, the restricted the visibility in close quarters is. It also means better target differentiation and more precise bearings.
• Mounting and installing a radar is simple in most cases. You should follow the instructions provided by the manufacturer and get all of the required hardware and cables before you begin. Finding the ideal place to do set up the unit depends on the size and weight of the model. The antenna should be installed as high as your boat allows. If you have any concerns about the process, you can hire a professional technician.
• Usage is crucial when buying a boat radar. You should think well about what you’re going to use the unit for before completing a purchase. Like we said at the beginning of our guide, you should determine whether you need stand-alone or multi-function radar. The former is suitable for small boats and if you sail in good weather and familiar areas. The latter is a good fit for larger vessels, long trips, or night fishing.
• New and old models use different technologies. The more traditional technology is using microwave signals, while the modern units use broadband radars. This new technology is more optimized and doesn’t emit radiation. Plus, it delivers high-resolution images and doesn’t require a warm-up period when turning on the radar.
• The waterproof rating is also essential, and naturally, all marine units must have it. That being said, they have different ratings. Some are ok to use with light splashes of water only, while others can withstand heavy rains.

Difference between a Radar and a Chartplotter

They can and should be used together because they serve different purposes. Radars detect what objects are around you – fixed and moving – and show you each of them. They also detect other vessels, fish, birds, etc.

A chart plotter, just like a GPS, shows you what should be around you at all times. It can indicate to you where buoys and land are. If you want to read more about GPS chart plotters, be sure to check our post on types and benefits of marine chart plotters and some product reviews.

Using both devices in combination provides you with a full image of your surroundings.

Frequently Asked Questions about Radars

It is natural that you would have additional and more specific questions about these products. We have prepared answers to some of the most commonly asked ones. You can also  read about other marine supplies, equipment, and products by checking out our designated boat accessories page.

What Can Boat Radars Detect?

Marine radars can detect various static and moving objects, such as other boats or ships, buoys, fish, birds, and more. The range of the radar depends on the model that you’re using.

Are Radars Dangerous?

The answer is no. Some people have concerns over the radio signals which marine radars use, but they do not cause any health issues to humans or fish. It is just a common misconception.

Will Rain Affect the Radar?

It is possible for rain to interfere with the signal. Rain could also reflect the signal and mask some smaller or faraway objects. However, the bigger or the closer an object is, the rain shouldn’t be a problem. Also, the higher-quality the radar is, the less chance there is to be affected by rain.

How Should I Maintain My Boat Radar?

Radar maintenance is simple. Most if not all, models of marine radars are built from durable materials that are intended to use near water. They should be fine in various harsh weather conditions. You also don’t have to worry about corrosion because they are made from marine-grade materials.

What is more, some products even have displays which can be used outdoors. So, to keep your radar up and running, you should just include its maintenance in your boat cleaning routine. Rinsing it with fresh water and wiping down impurities or bird droppings should be enough to maintain its performance. However, if you notice the radar is acting strangely, you should contact the manufacturer and discuss that and maybe postpone your night fishing.

What Does the Radar Come With?

There is no one answer to this question as it depends on the manufacturer and the seller. Some radars have all mounting hardware included in the package. Others have different cables that come with the radar. You can also find kits that include the antenna, a display, or other accessories. Of course, you can also find stand-alone radar without the additional parts.

Now that you’ve reached our guide’s end, we are sure that you know what the  best boat radar  for you is. As you see, we try to provide you with relevant and helpful information so that you can make an informed decision before purchasing. After all, it is our job and we love helping people.

You can feel free to share your thoughts and feedback. Do you want to see more  boat radar reviews?  You can take a look at our other guides and marine product reviews. We promise to keep you updated, so come back soon for more information on boat-related accessories.

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6 Best Marine Radars – Track Every Object And Maneuver At Close Range!

While every boater heads out for a relaxing day on the water hoping for sunny skies and clear weather, that’s not always what you get. When fog rolls in and visibility drops, it’s important to have a marine radar on your boat. The best marine radar alerts you to other boats in the area and obstacles like buoys so that you can safely navigate even when you can’t see more than a few yards beyond your boat. A boat radar is also essential if you find yourself sailing in close proximity to other ships.

There are a lot of factors to consider when choosing the best marine radar, which is why we’re here to help you find the best one. We looked at specifications like beam width and maximum range, which together determine your radar’s field of view and how early you will be alerted to potential hazards. We also looked at a rotation speed, which impacts how quickly the radar will update in any direction. Finally, we considered factors like power consumption, weight, and waterproofing. We compiled a list of top 6 picks, and the Garmin Gmr 18HD+ Radome turned out to be the best of them.

• Quick Summary
• Editor's Choice: Garmin Gmr 18HD+ Radome "If you are looking for a high-resolution radar with immense transmission power, then this is your choice. This radar is simple to install, and it has MARPA target tracking and guard zone alarm."
• Best Radar for Close-Range Detection: FLIR Raymarine Quantum 2 "This radar is quite impressive for its 6 meters detection range. It also outmatches other competitors on the market because it is easy to mount, and it allows you to navigate with zero visibility."
• Budget Pick: Furuno DRS4W "Budget-friendly marine radar for your vessel with decent parameters that shows great navigation performance. The unit has 4 kW transmission power. Moreover it is lightweight and compact."
• Best Marine Radar for Small Boats: Simrad Broadband 3G Radar "Any fisher with a small vessel will benefit from having this marine radar because it has close range of detection, low energy consumption, MARPA tracking and instant activation from standby mode."
• Customer’s Choice: Lowrance 3G Broadband Radar "Perfect marine radar that offers low power consumption, auto mode switching and MARPA system. This device is popular for its reliability what makes it an amazing pick for every sailor."
• Upgraded Pick: Lowrance 4G Broadband Radar "To get more power, accuracy and signal distance, you must consider this option. The upgraded version of Lowrance 3G Broadband, this radar tracks up to 10 targets with MARPA system and has excellent resolution."

Top 6 Marine Radars Review 2024

Garmin Gmr 18HD+ Radome

• Beam width: 5.2°
• Maximum range: 36 nm
• Minimum range: 20 meters
• Power consumption: 30 W
• Rotation speed: 24 rpm
• Weight: 17 lbs
• Waterproof rating: IPX7

More features: 4 kW transmit power, high resolution, guard zone alarm, clear echo definition, dynamic auto gain, easy to install, MARPA target tracking when combined with a multi-function display

This marine radar system from Garmin offers an incredible value for its rich feature set. To start, this radar offers 4 kW of transmission power, which gives it a range of up to 36 nautical miles. The minimum range is also impressive, at just 20 meters from your ship.

Better yet, if you have a multi-function display on your ship, you can activate MARPA tracking to stay abreast of movements in other ships around you. Helpfully, Garmin designed this unit to be compatible with a number of the company’s chartplotters, so you don’t need to overhaul your ship’s electronics to use it.

Resolution is another strong suit of this radar system. With a relatively tight 5.2° beam and dynamic auto gain, you can pick out ships and smaller objects on the radar display.

The only downside to this unit is that the power consumption is quite significant at 30 watts.

• 4 kW of transmission power
• High resolution
• MARPA tracking
• Excellent value
• 30-watt power consumption

FLIR Raymarine Quantum 2

• Beam width: 4.9°
• Maximum range: 24 nm
• Minimum range: 6 meters
• Power consumption: 17W
• Weight: 12.3 lbs
• Waterproof rating: IPX6

More features: Tracking of 25 simultaneous MARPA targets, CHIRP pulse compression for close-range zero-visibility navigation, lightweight and easy to install, safe emission, low power consumption

This wireless marine radar is unparalleled when it comes to navigating objects at close range. The 2-kW radar boasts a minimum range of just 6 meters, at which point objects are almost close enough to reach out and touch. In addition, the built-in MARPA system allows you to track a whopping 25 targets at once. If you routinely navigate busy harbors, there is no better radar system on the market.

Furthermore, this radar system is lightweight and consumes very little power. That makes it suitable for a huge variety of vessels, so anyone from fishermen to yacht owners can use it. The only thing to watch out for is that while the narrow 4.9° beam width gives you high resolution at distance, it means that small obstacles close to your boat might not be picked up the radar system.

• Minimum range of just 6 meters
• Track up to 25 targets
• Lightweight and low power
• Narrow beam

Furuno DRS4W

• Beam width: 7.2°
• Minimum range: 25 meters
• Power consumption: 24W
• Weight: 12.5 lbs

More features: easy to install, 4kW transmit power, good image quality, guard zone alarm, simple application interface

This compact and lightweight stand-alone marine radar from Furuno is perfect for mariners on a tight budget. At less than $1,000, it’s one of the most affordable radar systems and doesn’t compromise significantly on obstacle detection.

Where this radar cuts corners is the beam width. The wide 7.2° beam can make it hard to differentiate objects on the horizon. On the other hand, since the radar has a minimum range of 25 meters, it will help a lot in navigating harbors and marinas.

Also, the radar features 4 kW of transmission power for a range of up to 36 nautical miles. Plus, the application interface is simple to use, making it an excellent choice for first-time radar buyers.

• Lightweight and compact
• 4-kW transmission power
• Wide beam makes differentiating objects difficult

Simrad Broadband 3G Radar

• Minimum range: 50 meters
• Power consumption: 18W
• Rotation speed: 24/36 rpm
• Weight: 16.31 lbs

More features: MARPA target tracking (up to 10 targets), ready instantly from standby, low energy emission, low power consumption, close-range detection

This effective and compact boat radar from Simrad is designed for fast operation. While it primarily rotates at either 24 or 36 rpm, a 48-rpm rotation speed is available for nearly instantaneous updates at distances less than one nautical mile. Plus, the radar can be activated within a second from standby, so you’ll always be ready to jump to action if a ship or other obstacle sneaks up on you.

Fishers in particular liked this marine radar for small boats. The power consumption is just 18 watts, and the maximum range of 24 nautical miles is more than enough for most fishermen in small vessels. Plus, MARPA tracking allows you to keep an eye on up to 10 targets and issue automatic alarms while you’re busy reeling in a fish.

• 48-rpm rotation for instantaneous updates at close range
• Activate instantly from standby
• MARPA for up to 10 targets
• Low power consumption
• Limited to 24-nautical mile range
• 50-meter minimum range

Lowrance 3G Broadband Radar

More features: high detailed image, automatic harbor/marina and offshore modes, track up to 10 targets (requires a heading sensor), dual guard zone

This marine radar with low-power consumption from Lowrance is a favorite among boaters because it works well with nearly any ship – from small fishing boats to large yachts. On top of that, users love the automatic mode switching between close-range radar in the marina setting and long-range radar in the offshore environment by changing rotation speeds. Still, the 50-meter minimum range can make it difficult to navigate through tightly packed harbors.

The 2-kW transmission power enables this radar to view targets out to 24 nautical miles. Besides, if you add a heading sensor to the unit, you can track up to 10 targets with the built-in MARPA system. It also offers two guard zones to warn you about potential collisions.

• Works with wide variety of ships
• Automatic mode switching
• MARPA system with two guard zones
• Only 24 nautical mile range

Lowrance 4G Broadband Radar

• Power consumption: 20W
• Rotation speed: 24/36/48 rpm

More features: beam sharpening – target separation at 3.5ft, track up to 10 targets (requires a heading sensor), dual guard zone, high accuracy, low power consumption

If you’re looking for the best marine radar on the market and budget isn’t an issue, it’s hard to beat the 4G model from Lowrance. The 4-kW transmission power offers range up to 36 nautical miles while still allowing you to see objects at just 50 meters from your boat. Better yet, the beam is sharp enough to separate objects that are just a scant 3.5 feet apart.

The relatively modest weight and power consumption of this radar system makes it suitable for a wide variety of boats. Plus, it comes with a MARPA function able to track up to 10 targets simultaneously and warn you about potential collisions in two guard zones. The beam rotation can also be adjusted between three speeds to save power and give you finer resolution of far-away objects.

• Extremely good beam resolution
• Track up to 10 targets with MARPA
• Multiple beam rotation speeds

• Things to Consider

Choosing the right marine radar system can be difficult with so many options on the market. In our buying guide, we’ll take a closer look at how marine radars work and cover all of the features you need to know about when choosing a boat radar system.

How to decide which marine radar is the best?

Figuring out which marine radar is best suited to your boat requires understanding how these systems differ from one another. Here, we’ll explain everything you need to know about the features and technical specifications that impact your radar system.

Transmission power is the most important thing to consider when choosing a radar for your boat. Power, more than the height of your antenna or any other factors, determines how far out you’ll be able to detect objects on the water. High transmission power radars like the Garmin Gmr 18HD+ Radome and Furuno DRS4W offer 4 kW of power, which equates to a range of around 36 nautical miles. Less powerful models like the Simrad Broadband 3G Radar and FLIR Raymarine Quantum 2 offer 2 kW of power, which gives a shorter range of 24 nautical miles.

Power consumption is also worth considering since you need to keep your radar running. Heavy-duty radar systems like the Garmin consumes 30 watts of power, which can put a strain on smaller boat batteries. Smaller boat radars like the 18-watt Simrad unit may be more suitable for less powerful vessels.

If you have a small boat, it’s also important to consider the weight of different marine radar models. Some radar systems, like the ones from Simrad , Lowrance , and Garmin , weigh over 16 pounds.

The mounting point on your boat needs to be able to hold this weight safely, or else you’ll need to reinforce it or choose a lighter marine radar system.

When it comes to beam width, there are a few competing things to consider. A narrower beam is generally better for resolution, especially if your target is far away. This is important if you’re trying to distinguish two objects that are close together, but far away from your boat.

Nevertheless, a narrow beam can actually entirely miss a small object close to your ship. That’s because the narrower the beam, the wider the target has to be in order for the radar system to detect it.

Beam widths vary among marine radar systems, but the common beam width of 5.2° offers a good compromise between resolution and detection at close range.

The maximum range of your radar system depends largely on the transmission power, although other factors like antenna height and the size of the target object can also play a role. 24 nautical miles is considered a relatively short range, while the 36 nautical mile range found on the Garmin and Lowrance 4G radars is preferable for safety in low visibility conditions.

It’s important to think about minimum range, too, especially if you execute maneuvers close to another ship or to other obstacles. Radar systems like the one from FLIR are designed to be mounted low on your boat and are specially designed for close-range performance to give you a minimum distance of just 6 meters.

• Waterproof rating

All of the radar systems we reviewed are rated IPX6 or higher. This waterproof rating indicates that the radar systems are fully waterproof and will be okay in heavy rain. Importantly, these systems are also able to withstand water hitting, as would happen in the case that the radar is overtopped by a wave. While you can, in theory, submerge your radar for an extended period, it’s a good idea to keep it out of the water as much as possible.

• Ease of installation and use

Marine radars are designed to be easy to mount with a kit, which is often included with the radar unit itself. It’s essential to make sure that the radar will fit your boat and isn’t too heavy for your boat’s mounting point, which is usually the highest point of the boat so that the radar has a 360° view.

Before adding a marine radar to your boat, it’s also important to consider whether your current displays are compatible with boat radar. Some chartplotters and fish finders are not able to show radar displays – instead, you’ll need a multi-function display that is capable of working with the marine radar system you’re interested in.

• Your personal experience

Ultimately, choosing the right marine radar system comes down to what you need. If you’ve never used marine radar before, it might be worthwhile to opt for a less expensive system that gives you solid functionality without costing an arm and a leg. On the other hand, if you have had good experiences with radar systems from a particular brand, you may want to stick with radars from that same brand. Be sure to think about how much range you realistically need, and particularly what minimum range will be important for your boating.

• Price ranges

Marine radar systems are not cheap. Most units are well over $1,000, with the notable exception of our budget pick from Furuno – which is just over $900. The most expensive radars we reviewed, the Lowrance 4G and FLIR models, cost more than $1,800 each.

• I want to use my marine radar in harsh weather conditions. What is the operating temperature range and maximum wind speed?
• What do I need to mount and use the marine radar?
• What does MARPA(ARPA) stand for radar?

Our three overall favorite marine radars on the market today are the Garmin Gmr 18HD+ Radome , the FLIR Raymarine Quantum 2 , and the Furuno DRS4W . We feel that the Garmin radar is the overall best marine radar thanks to its excellent combination of features and value. It offers an impressive 36 nautical mile maximum range and a minimum range of just 20 meters. Plus, the dynamic auto gain builds on the already impressive resolution to ensure you can clearly differentiate targets. The FLIR Raymarine Quantum 2 comes at the second place with its 6 meters detection range. It also outmatches other competitors on the market because it is easy to mount, and it allows you to navigate with zero visibility. The Furuno DRS4W ends the top 3 as a budget-friendly marine radar for your vessel with decent parameters that shows great navigation performance. The unit has 4 kW transmission power, and it is lightweight and compact.

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4 Best Radome-enclosed Boat Radar Options for Recreational Sailors

• By David Schmidt
• Updated: March 27, 2024

When I was a kid, my dad and I watched an aircraft carrier break apart. At least, that’s what it looked like on his radar , which employed a cavity magnetron transmitter and a monochrome display. The year was 1988, and we were crossing Muscongus Bay , en route from Port Clyde to East Boothbay, Maine . We were aboard Windancer , my parents’ C&C 37, in classic pea-soup fog. Looking at the radar display, we could see something enormous a handful of miles off our starboard bow.

And then suddenly, our “aircraft carrier” dissolved. We rushed on deck and—some tense minutes later—discerned engines and voices through the murk. So much for a Nimitz-class carrier. This was nothing more than a flotilla of small powerboats we called “gnats.” We arrived in East Boothbay safely and in time for dinner, and we still laugh about how that radar’s lack of target separation caused serious, if short-lived, situational-awareness anxiety.

While it’s easy to say that nuclear energy was the decisive technology that helped the Allies win World War II, the truth is that cavity magnetrons and radar-guided anti-aircraft guns played a far bigger role. Flash-forward to the late 1950s, and radar began emerging on commercial and, eventually, recreational vessels. These “pulse-modulated” magnetron radars ­create pulses of radio-frequency (RF) energy that’s transmitted from a rotating directional antenna. This energy travels at the speed of light in a narrow, horizontal band before bouncing off targets and returning to the antenna as an echo.

While effective, magnetron-based radars have some drawbacks. They sometimes struggle to separate closely spaced targets, and analog cavity magnetron transmitters are subject to temperature swings, aging, and manufacturing variables (from one magnetron to the next) that make it impossible to do Doppler processing on returning echoes.

The marine world began adopting solid-­state transmitters in late 2008, and the first recreational Doppler-enabled boat radars arrived in early 2016. These transmitters generate highly predictable frequencies that enable Doppler ­processing, which lets radar manufacturers color-code radar targets based on their threat level. These radars also deliver far better close-range performance (read: no main bang or blind spots) and weigh less than magnetron-based radars.

Here’s a look at the four best radome-­enclosed boat radars for recreational sailors. All of these systems use solid-state ­transmitters, and deliver Doppler processing and a host of other features. If you still cruise with an old magnetron-­based radar, consider upgrading. The costs are not insignificant, but the improved radar imagery is worth it.

Quicklook: 4 Best Radome-enclosed Recreational Marine Radars

• B&G HALO20, HALO20+ and HALO24

Furuno DRS2D-NXT and DRS4D-NXT 

Garmin gmr fantom 18x and gmr fantom 24x , raymarine quantum 2 , b&g halo20, halo20+ and halo24 .

B&G started employing solid-state radar transmitters in 2008. While these systems generated good short-range imagery, their long-range performance didn’t compare to analog pulse-modulated radars. This changed in early 2015 with the arrival of B&G’s Halo open-array, pulse-compression radar, which gave powerboaters great short- and long-range performance. 

B&G’s latest radome-enclosed, solid-state radars—the HALO20, HALO20+ and HALO24—build on this performance and add Doppler processing (plus MARPA target tracking) in a ­sailing-friendly radome that won’t accidentally ingest running rigging.

As with all radars, greater power and a bigger antenna translate to greater range and better imagery. To this end, the HALO20 operates on 20 watts (maximum consumption) and spins its 17.5-inch antenna (which is fit inside a 20-inch radome) at 24 revolutions per minute to provide 24 nautical miles of range; its big brother, the HALO20+, employs the same antenna, but it spins it at up to 60 rpm (this is dynamic, depending on the range involved) and operates on 29 watts of power for 36 nautical miles of range.

Both 20-inch HALO radars come with optional preset user modes that include harbor, offshore, weather, north up and course up. The HALO20+ also comes with a fishing-friendly bird mode and dual-range capabilities. The latter allows a user to split the radar screen in half, with one side running at, say, 10 nautical miles, while the other is set to maximum range. 

The HALO24 boat radar is aimed at sailors ­seeking greater range. It employs a 22-inch antenna inside a 24-inch radome that it spins at up to 60 rpm. It operates on 29 watts for a range of 48 nautical miles. The HALO24’s bigger antenna allows it to generate smaller beam widths, which further helps the radar to separate targets onscreen. It has the same preset operating modes as the HALO20+.

All three radome-enclosed HALO boat radars are built to IPX6 standards, and all play nicely with B&G chart plotters.

Furuno has long enjoyed a strong reputation for magnetron-based radars, and was the first marine company to unveil a radome-enclosed, Doppler-enabled radar. The DRS4D-NXT could differentiate dangerous and passive targets onscreen using proprietary and Doppler-based features, which operate much like a layer on an electronic chart. Users can turn it on or off, depending on conditions.

Furuno also bundled full ARPA ­capabilities into the system, which allows the radar to acquire and track up to 40 targets automatically. Users can ­manually enter 60 additional targets, which the system then also tracks. 

However, the DRS4D-NXT has a 22- to 22.5-inch antenna inside its 24-inch radome and weighs 16.1 pounds, making it better-suited for larger sailboats. Enter the DRS2D-NXT boat radar, which Furuno released in 2022. This ARPA-enabled system comes bundled in a 19-inch radome, which houses its 17- to 17.5-inch antenna, and weighs 14.3 pounds. It’s an easier fit aboard smaller rides. 

While both systems transmit at 25 watts and spin their antennas at variable speeds for 48 nautical miles of awareness, there are some differences.

As mentioned, radars that transmit tighter RF beam widths generally yield better target separation than systems with wider beams. While both radars have vertical beam widths of 25 degrees, the DRS4D-NXT has a horizontal beam width of 3.9 degrees, while the DRS2D-NXT’s beam is 5.2 degrees. Also, the DRS4D-NXT comes with a bird mode, which is likely more applicable to anglers than sailors.

Otherwise, both radars are similar, and both come with Furuno’s RezBoost beam sharpening, which—when cranked—­reduces the horizontal beam widths of both radars to 2 degrees. Additionally, both systems have Furuno’s Doppler-based target-analyzer and fast-target tracking features. They color-code targets based on their direction of travel relative to your boat, and display course and speed information of user-selected targets. Both radars are compatible with Furuno plotters.

Garmin made headlines in 2016 with its 40-watt Fantom radars. They were available with 4- or 6-foot antennas, and had Garmin’s MotionScope technology. While these radars were impressive in terms of their Doppler capabilities and solid-state transmitters, they were of limited use to most sailors because of their open-array antennas. Garmin solved this problem with the GMR Fantom 18 and GMR Fantom 24 radars in late 2016. They came bundled in a sailing-friendly radome and delivered ranges of 20 feet to 48 nautical miles. More important: Both radars had Garmin’s MotionScope technology and operated on 25 watts of power.

Garmin refreshed these radars in late 2021 with the GMR Fantom 18x and GMR Fantom 24x systems. They have the same ranges but with purportedly better target-separation capabilities, including in rain or fog. Customers can spec a GMR Fantom 18x to operate at 40 or 50 watts, while all GMR Fantom 24x boat radars operate on 50 watts. Garmin’s smaller radome-enclosed system employs a 17-inch antenna, and the bigger system has a 23-inch antenna. 

In a departure from the traditional, both radars can be purchased with a white or black radome. Customers seeking a GMR Fantom 18x in black must opt for the 50-watt version. 

Both new radars have Garmin’s MotionScope, and have features such as target size, which allows users to adjust onscreen target resolution for better target separation; echo trails, which generates historical trails of onscreen targets to help increase situational awareness; dual-range mode; MARPA (this requires a separate heading sensor such as Garmin’s nine-axis heading sensor); and dynamic auto gain, which automatically tunes the radar’s gain to best match the environment. Both radars let users overlay radar imagery atop cartography, set guard zones, and use Garmin’s variable range markers and electronic bearing lines to measure distances and bearings to land and other vessels.

Both boat radars are built to IPX7 standards and are compatible with Garmin-built chart plotters . 

Raymarine’s original Quantum radar, in 2016, was the world’s first chirp-enabled, solid-state and wireless radar. While the original Quantum lacks Doppler processing, its wireless configuration was a hit with sailors who were less than thrilled to run boat radar cabling down their mast or to drill deck holes. 

Raymarine backfilled Quantum’s lack of Doppler processing in early 2018 with the Quantum 2 radar. Both ­systems are IPX 6-rated, have peak power outputs of 20 watts, deliver 4.9-degree horizontal beam widths and 20-degree vertical beam widths, and employ 18-inch antennas housed in 21.3-inch radomes that spin at 24 rpm for ranges of 18 feet to 24 nautical miles. Both systems can transmit their radar imagery to compatible Raymarine chart plotters over Wi-Fi, or they can share imagery over a RayNet Ethernet cable.

While the radars come bundled in nearly identical radomes, the similarities stop once the echoes start returning and Quantum 2 begins color-coding targets based on their threat level. Quantum 2 also has Raymarine’s automatic target acquisition and tracking features, which generate data including the other vessel’s speed, course, and closest point of ­approach. Sailors can further bolster their situational awareness by configuring safety zones. Once activated, Quantum 2 tracks targets inside the ­safety zone, and it alerts users via visual and audible alerts if new vessels appear. And Raymarine’s true trails feature lets users study other vessels’ previous returns, which Raymarine refers to as “historical wake.” 

While Quantum 2’s range and peak power outputs are less than some other radars. These boat radars also consume less juice, which can be beneficial to sailors on strict DC diets.

David Schmidt is CW ’s electronics editor.

Vendor Information

B&G from $1,900

Furuno from $2,400

Garmin from $2,000

Raymarine from $1,950

What is boat radar used for?

Boat radar is a navigational tool used to detect and track objects such as other vessels, land masses, rain squalls, and navigational hazards that may not be visible to the naked eye. It provides enhanced situational awareness and aids in safe navigation, especially in conditions with limited visibility or heavy traffic.

How far does boat radar reach?

The effective range of boat radar varies depending on factors such as the radar’s power output, antenna size, and height above the waterline, but generally, it can detect targets from a few hundred meters up to 48 nautical miles (89 kilometers) or more for larger, more powerful radar systems.

Is it worth having radar on a boat?

Having radar on a boat can be a valuable investment, especially for larger vessels or those navigating in areas with high vessel traffic, limited visibility, or challenging weather conditions. It provides enhanced situational awareness, helps identify potential hazards, and assists in safe navigation, making it worth the cost for many boaters who prioritize safety and collision avoidance.

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The Latest Marine Radar Systems

Advertisement

Garmin and Raymarine have launched new arrays that enable you to spot potential trouble miles away.

When you want to see far — really far — into the distance from your boat, you need a potent radar. If you're shopping for an upgrade or planning a bold adventure for next season, Raymarine and Garmin may have what you need.

Brace for a 'Cyclone'

Raymarine's new Cyclone is available in 3-, 4-, and 6-foot arrays that sit just 13.1-inches high. Cyclone spins at 60 rpm while pumping out CHIRP pulse compression and beam-sharpening tech that produces the equivalent power of a six-kW magnetron (Cyclone) or of a 12-kW magnetron (Cyclone Pro), providing max ranges of 72- and 96-nautical miles.

Check out Raymarine's promotional video on Cyclone.

Doppler target tracking, auto tracking up to 50 ARPA targets, and bird mode are all in the mix. Cyclone radars integrate with Axiom, Axiom+, Axiom Pro, and Axiom XL MFDs. $6,999.99–$9,749.99 | Raymarine.com

'Fantom' of the Seas

Have you ever heard of MotionScope Doppler effect tech? Check out Garmin's new GMR Fantom 18x/24x. On top of offering all the features and functions of previous Fantom models, these new versions pump out 50 watts of power to extend range from 20 to 48 nautical miles and boost target detection in difficult conditions like rain.

Check out Garmin's promotional video for its upgraded Fantom series.

The new Fantoms also have an increased refresh rate, with the antenna spinning at 60 rpm. Garmin can now customize the look, too, offering both black and white domes. $2,199.99–$3,099.99 | Garmin.com

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Top tech writer and accomplished sports fisherman, BoatUS Magazine Contributing Editor Lenny Rudow has written seven practical boating books, won 30 awards from Boating Writers International — many for his marine electronics articles – and two for excellence from the Outdoor Writers Association of America. He judges the NMMA Innovation Awards, and is Angler in Chief at FishTalk, his own Chesapeake-based publication. A great teacher and inspirational writer, Lenny hosts many of BoatUS Magazine’s very-popular how-to videos, which can be found on the BoatUS YouTube channel, or at BoatUS.com

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Best Marine Radars of 2024

Though once only reserved for very large commercial or passenger vessels, radar is now compact and ubiquitous on smaller sailboats. Marine radar is 100% necessary to help you “see” through fog, darkness, and inclement weather. Even if you enjoy navigating by the stars, it’s nice to have radar available to let you know of incoming boat traffic and unseen obstacles in water, particularly if you’re boating closer to shore. Whether you’re more into multi-day cruising or just are looking to explore closer to home this upcoming season, we’ve put together this guide to help you choose the best marine radar for you and your vessel. Included in this guide is also some key vocabulary and information to help you make the most informed purchase possible. Check it out, and see you out there, sailor!

For more of our top sailing gear recommendations, check out the Best Marine GPS Chartplotters .

Quick Answer - The Best Marine Radars

• Raymarine RD418HD Color Radome View at Amazon
• Raymarine Quantum 2 Q24D Doppler 18” View at Amazon
• Garmin Fantom 18” Pulse Compression Dome Radar View at Amazon
• Simrad Halo 20+, 20” View at Amazon

Comparison Table - Best Marine Radars

Reviews - Best Marine Radars

Raymarine rd418hd color radome.

• Beam : 4.9 degrees H
• Transmit Power : 4 Kilowatts
• Dimensions : 20 ½” Diameter x 9 11/16” Height
• Weight : 21 pounds
• Warranty : Three Years (with product registration)
• Maximum Range : 48 Nautical Miles
• Amperage : 3.3 Amps
• Offers A 256-Color Radar Display With Clear, Lifelike Presentation
• Includes A Bird Mode For Automatically Detecting Flocks Of Sea Birds Hovering Over Schools Of Fish
• Can Monitor Both Long And Short Range Distances Simultaneously With A Single Scanner

BEST FOR: SMALLER VESSELS

If you’ve got a smaller sailboat or a fishing boat around which you’re moving a lot to catch your fish, you’re going to want a compact radar system that won’t get in the way of your enjoyment and won’t look unsightly on board your boat. This Raymarine Radome is with its moving parts inside of its dome, so you don’t have to worry about long, swinging arms that need to constantly rotate. 

This device doesn’t, however, compromise on performance with its smaller size. Its automatic settings – like its adaptive digital receiver that automatically adjusts to changing environmental and sea conditions – makes this radar system efficient and easy to use. If you do like fishing, it also has an automatic Bird Mode that detects flocks of birds hovering over schools of fish out at sea. Follow the birds and you’ll find the fish!

Raymarine Quantum 2 Q24D Doppler 18”

• Beam : 4.9 degrees H x 20 degrees V
• Transmit Power : 20 watts
• Dimensions : 8.25” Height x 21.3” Diameter
• Weight : 12.3 pounds
• Maximum Range : 24 Nautical Miles
• Amperage : 0.58 Amps
• Doppler Moving Target Display Allows For Superior Sight And Awareness
• 24 Nautical Mile Range Helps You Prepare For Traffic, Obstacles, And Weather
• Lightweight And Easy To Install Design

BEST FOR: DAY CRUISING

When you are heading out on a day cruise, you’re most likely spending time traveling in and out of busier ports and traveling closer to shore. Increased traffic and obstacles like rocks in the water are much more likely in this scenario, and you’ll therefore want a radar system that can handle real-time updates and powerful transmission.

This device’s doppler moving target display updates as you move. It also color codes moving radar contacts (i.e., other boats or obstacles) for instant visual recognition, thereby reducing your risk of collision. It also features Pulse Compression technology, which ensures superior imaging at longer ranges allowing you to plan for upcoming traffic and obstacles in your pathway. Finally, this device is energy efficient and lightweight (about 50% less weight than other radar devices in its class), so it’s easy to install and mount.

Garmin Fantom 18” Pulse Compression Dome Radar

• Beam : 5.2 degrees H
• Transmit Power : 40 watts
• Dimensions : 9.8” Height x 20” Diameter
• Weight : 11.4 pounds
• Warranty : Two Years
• Amperage : 12 Watts
• Uses Doppler Technology To Identify And Display Moving Targets
• Produces Color-Coded, High Resolution Images For Easy Visual Recognition
• Compatible With Garmin Chartplotters For Clear, Concise Voyage Planning

BEST FOR: LONG RANGE DETECTION

This Garmin radar device packs a lot of power into a small, compact package. Its Doppler technology works really well to highlight moving targets to avoid potential collisions, find flocks of birds if you’re looking to drop your fishing line into the water, and track weather formations. This motion detection works from 20 feet from your vessel all the way out to 48 nautical miles; if you’re headed out on a multi-day cruise, you’ll truly be able to plan your route with all the information to stay safe out on the ocean. 

Finally, this radar system also color codes its moving targets and provides extremely high resolution so that you can see any objects or weather in your path with a quick glance at your screen and without coordinating a series of complicated nautical charts.

Simrad Halo 20+, 20”

• Beam : 4.9 degrees H x 25 degrees V
• Transmit Power : 25 watts
• Dimensions : 8.8” Height x 20” Diameter
• Weight : 13 pounds
• Maximum Range : 36 Nautical Miles
• Amperage : 0.17 amps
• Features Dual Range Mode That Allows You To See Both Short And Long Range Distances At The Same Time
• Provides Almost Real-Time View At Closer Ranges
• Ready Instantly From Stand-By Mode Without The Need For A Long Warm-Up Time

BEST FOR: COASTAL CRUISING

Though it may seem like cruising far out at sea would be more dangerous than closer to the coast, coastal cruising brings with it lots of hazards not found far from shore. From boat traffic to rocks and other obstacles in the water to variable weather systems, you’re going to want a robust radar system that can keep up with all of these quickly changing variables. 

This Simrad marine radar device offers an almost real-time view of moving objects so that you can plan your route around oncoming boat traffic and avoid collisions. The addition of its VelocityTrack technology will give you instant feedback on whether a target is moving toward or away from you and color codes obstacles for easy-to-read visuals, thereby further reducing your chance for a collision.

THINGS TO CONSIDER WHEN BUYING MARINE RADAR

Electronic compatibility.

Before purchasing your radar system, you’re going to want to make sure that it’s compatible with your existing GPS or chartplotter system to be able to display your radar images as well as your electronic capacity on your boat. No need to overdo the size and capacity of your radar for the size of your vessel or how you enjoy using your vessel. Multi-day cruises require a different scope of radar technology.

For more information about choosing the right marine radar for your sound system , check out this article from West Marine.

DO YOU HAVE A SMALL OR LARGE VESSEL?

You’re installing your subwoofer on your sailboat, and so you’re going to want to make sure that you have the proper infrastructure to handle your radar system. The devices can be compact and lightweight or quite heavy and wide. Make sure you measure before purchasing and attempting to install.

WHAT KIND OF RADAR RANGE WILL YOU NEED?

If you spend most of your time cruising around your local harbor and along your local shoreline, it’s unlikely that you’ll need seriously long range radar. After all, you’ll only really need something that can see as far out as your day-cruise can take you. If you’re headed out on a multi-day cruise, then you’re going to want marine radar that has quite a long range to look out for weather and boat traffic in unfamiliar waters.

WHY DO I NEED RADAR?

Even if you feel like you know your local waters really well, unexpected inclement weather or fog can really obscure what was once in plain sight. It’s very easy to get turned around or not recognize low tide coming in if your sight is obscured. Additionally, if you enjoy fishing, radar that comes with a Bird Mode to check for flocks of seabirds feeding on schools of fish can be really useful as you’re looking for a good place to drop your line.

FEATURES EXPLAINED

A system for detecting the presence, direction, distance, and speed of moving objects out of sight. Pulses of high-frequency electromagnetic waves are reflected off an object and sent back to the device.

NAUTICAL MILES

A unit that measures distance at sea, equal to approximately 2,025 yards (1,852 meters).

PULSE COMPRESSION

A technology used to increase the range resolution as well as signal of radar.

A dome or structure that protects the radar equipment. 

The strength of an electric current in amperes.

The distance that a radar device can detect. It typically has both a minimum and maximum range.

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Choosing the Best Marine Radar

• By Boating Staff
• Updated: December 2, 2016

Q. What are digital, HD and broadband marine radars?

A. Most marine radars today are digital in that their signals are digitally processed to produce a more sensitive radar picture. When it comes to conventional radar (those that use a magnetron), HD (high definition), super HD, UHD (ultra high definition) and similar terms are used to indicate higher levels of performance.

Clues to better performing radars include a higher radiated power (in kilowatts), antenna array of larger size (in horizontal inches) and the narrowest horizontal beam width (in degrees).

Radars with bird- and weather-cell detection ability are rated among the highest in performance. These marine radars have at least 6 kW or higher radiated output power and antennas of 4 feet or more.

Solid-state or broadband models work on an entirely different principal. They do not use magnetrons and require less power to operate. They have exceptional ability to display targets within 20 feet compared to about 200 feet for conventional radars. They also read significant detail out to around 6 miles, but they tend to lack sharp detail on longer ranges.

Marine Radar All radars can help you to keep from colliding with other boats or objects. The level of performance you choose will depend on the range, the detail and resolution of radar targets and the amount of money you are willing to spend.

Quality Counts Better radars with higher specifications can better identify and alert you to small fiberglass boats, unlit buoys and other low-profile obstructions at distances that might be missed by lesser performing radars. Compare radar specs when selecting performance radar.

Remote Wi-Fi Operation Wi-Fi is a feature of a number of navigation displays. With the aid of a downloadable app, you view and control your display screen on an Apple or Android smartphone or tablet. This gives you a remote for radar, GPS, fish finder, etc. that you can hold in your hand while you move about the boat. The Furuno DRS4W 1st Watch dome antenna, for example, is a low-cost radar ($1,695) that uses Wi-Fi to display a radar picture wirelessly on an Apple iPhone or iPad.

Color-Sensitive Targets Radar with Doppler capability, like the Furuno DRS4D-NXT and Garmin GMR Fantom radars, features echoes that change color dependent on their threat level, which can add to your safety. Green, for example, can indicate stationary targets or those that are moving away from you, while red targets can signal those moving toward you.

Solid-state/broadband radars operate immediately, without any warmup time. They transmit and receive signals simultaneously, drawing about one-quarter of battery current of conventional marine radars while remarkably radiating less power than your smartphone.

Simrad’s HALO series ($4,500 to $5,500) combines the advantages of both conventional and solid-state radars. It offers good target detection and resolution on short, medium and long ranges. HALO could be pointing the way to what we’ll expect of radars in the future.

Preset Control Settings These can automatically provide you with an optimum picture for the boating situation at hand. These settings include preset modes for local and harbor, open water and long distance, weather cell spotting, and fishing/bird modes.

Dual-Range/Split-Screen Some radars offer side-by-side views of short and a more distant long range. Alternately, you can display two screens, set to the same range with different preset modes. Split screens can increase radar return-echo details that could otherwise be missed.

Display Size and Resolution These can be significant factors in viewing the most detailed radar picture. Larger size displays with high resolution can improve target visibility significantly. Display resolution can vary from 640 x 480 to 1920 x 1200 or more. The bigger the display screen and the higher the resolution, the better, and more detailed your radar picture will be.

• More: Ask Ken , Electronics , Gear , radar

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4 Best Marine Radars In 2023

Reviewed By Herb Benavent / Boating Editor

OUR TOP PICK

Raymarine Quantum

Editors choice.

Garmin GMR 18HD+ Radome

Furuno DRS4W Wireless

The top 4 marine radars in 2023.

• 1. Raymarine Quantum
• 2. Garmin GMR 18HD+ Radome
• 3. Furuno DRS4W Wireless
• 4. Lowrance GPS and Chartplotters

Spending time on the open water is a great way to relax. While you always hope for nice weather, perfect visibility can’t be expected every time. This is why you need a marine radar on your boat – it will alert you to objects before you can spot them and prevent you from colliding with them.

Marine radars help you navigate when the visibility is low, so you’re always aware of your surroundings. On top of this, the best marine radars will detect even smaller objects, like dinghies and buoys, to ensure that you can steer clear. Depending on the model, marine radars show you objects from 20 feet away to more than 30 nautical miles away.

If you are lost at sea with deciding which marine radar to choose, our guide is here to help. We have selected 4 of the best marine radars and created a buying guide to help you determine which boat radar system is right for your vessel.

Thanks to its fantastic precision and reliability, the Raymarine Quantum radar stands head and shoulders above all others. With radar features like Advanced Target Separation and CHIRP pulse compression, the Quantum gives you unparalleled target clarity. On top of this, it shows everything in high resolution and with amazing detail.

A great thing about this radar is that it easily detects even smaller targets like kayaks and buoys. The mentioned CHIRP pulse compression delivers more energy to each target around you. And, what’s even better, this top-rated radar is exceptionally good at detecting close objects, as close as 18 feet. Because Quantum radar for boats uses solid-state technology, it’s ready to use immediately (no warm-up period).

Using a Wi-Fi connection, the Quantum can connect to any Raymarine Lighthouse II powered MFD. When it comes to installation, its thin cabling makes everything simple. Finally, smart engineering makes Quantum radar more than 50% lighter than other models. All of this makes it the best marine radar on the market.

• Stand Out Features - Why We Love It
• Advanced Target Separation technology displays each object clearly
• Unsurpassed resolution with enhanced target detail
• CHIRP pulse compression delivers more energy to each target
• Top-level short-range detection (18 feet)
• Economic operation with reduced power consumption

Dimensions: 21.3in (diameter) x 8.25in (height) Power consumption: 20W Max range: 24 nautical miles Min range: 18 feet (5.5 meters) Frequency: 9354 to 9446 MHz Waterproof rating: IPX6 Weight: 12.3 pounds

The Garmin GMR 18HD+ radar offers crystal-clear echo definition regardless of range. With 4 kilowatts of transmission power, the 18HD+ detects targets up to 36 nautical miles away. On the other hand, it’s very sensitive to close targets too, so you’ll be able to see objects that are only 20 meters from your boat.

The compact design of this radar makes it an excellent choice if your boat is limited on radar space. The device is incredibly easy to install, and the interface is very intuitive and user-friendly. All the radar images are overlaid on the chart plotter map page, giving you a better navigational picture.

In addition, this radar features Dynamic Auto Gain and Dynamic Sea Filter, which significantly improve its performance in bad weather and sea conditions. If you pair it with a heading sensor and a multifunction display, it can even give you MARPA tracking. Radar systems reviews reveal plenty of satisfied customers for this model, and the features make it one of our favorites.

• 4kW transmission with clear echo definition
• Dynamic Auto Gain offers improved performance in bad weather
• Dynamic Sea Filter adapts to different sea conditions
• Radar image overlay on the chartplotter map page
• MARPA tracking (requires a heading sensor and a multifunction display)

Dimensions: 20in (diameter) x 9.8in (height) Power consumption: 30W (48W max) Max range: 36 nautical miles Min range: 20 meters Rotation speed: 24rpm Waterproof rating: IPX7 Weight: 17 pounds

The Furuno DRS4W offers something unique – you can easily connect it with your smartphone and receive a radar image directly on your device display. The DRS4W radar is compatible with all iOS devices, and Furuno allows you to download their app from the app store for free.

The app gives you insight into various details and allows you to change modes of operation. You can choose between day and night modes for easier visibility. For each target, you can get information about the distance from your boat. On top of this, you can set a guard zone so the app notifies you when something comes within your preset range.

When talking about technical details, the DRS4W has a 4kW power output with a maximum range of 24 nautical miles. The device is very sturdy, able to withstand headwinds up to 70 knots. It has an excellent waterproof rating (IP26) and works equally well in high or low temperatures. Combine this with the affordable price, and you’ll see why it’s our best value pick.

• Completely wireless operation (shows targets on your phone)
• Compatible with any iOS device (iPhone, iPad)
• Quick and easy radar installation
• Adjustable guard zone with notifications
• Off-the-center mode for better front visibility

Dimensions: 18in (diameter) x 10in (height) Power consumption: 24W Max range: 24 nautical miles Min range: 0.125 nautical miles Rotation speed: 24rpm Frequency: 9410 ± 30 MHz Temperature rating: -25°C to +55°C Waterproof rating: IP26

Lowrance GPS and Chartplotters

The thing we like most about the Lowrance marine radar system is that it gives you a clear image as soon as you turn it on. Unlike many other radar systems, the InstantOn feature eliminates the need for the sailboat radar to warm up. 

The low power consumption of the Lowrance radar is ideal for boats of any size, whether you’re cruising or fishing. To make use easier, it features automatic clarity and automatic harbor/marina and offshore modes. The radar merges the signal with cartography, giving you the most complete information about surrounding structures. Additionally, you also get MARPA tracking for up to 10 targets.

Finally, we also want to mention that you can choose the rotation speed (24 and 36 rpm). This is fantastic because higher rotation speed allows you to detect targets even if you’re moving very fast. This makes it an excellent choice for speedboats, as it will always give you information instantly.

• The InstantOn feature gives an image immediately (no warmup)
• Low power requirement makes it great for smaller boats
• MARPA tracking with up to ten targets
• Detail-rich display merges radar image with cartography
• High-speed mode (36rpm) for instant updates

Dimensions: 19.3in (diameter) x 11in (height) Power consumption: 18W Max range: 24 nautical miles Min range: 200ft (50m) Rotation speed: 24/36rpm Temperature rating: -25° to +55°C (-13° to +130°F) Waterproof rating: IPX6 Weight: 16.31 pounds

How To Choose The Best Marine Radar – Buying Guide

The rule of thumb for radars is that more power is better. A powerful marine radar allows you to see farther and smaller objects. Power is really what determines how well your marine radar system functions, more than the height of your antenna or the height of your target.

Poor weather conditions like rain, fog, and drizzle absorb energy from your marine radar, which means a reduction in the radar range. The stronger the radar, the better it will perform in poor weather. Usually, a radar for boats will have a power range of 4kW to 25kW.

There are also lower power options available (like 2kW), but keep in mind that you get what you pay for. A 2kW marine radar will give you a radius of about 24 nautical miles, which isn’t much. This is why we recommend that you power up and get a marine radar with a larger radius.

Two technologies are used in marine radar systems. The older system is the traditional pulse radar, while the newer is a solid-state or broadband radar.

Pulse radars use high powered magnetrons to generate microwave signals with short pulses of voltage. On the other hand, solid-state radars use FMCW (Frequency Modulated Continuous Wave) technology, which is more similar to a CHIRP sonar system.

Solid-state radars tend to be the more popular choice because they emit less radiation, have flexible installation, better target resolution, require no warm-up time, and have high maximum ranges.

You want to mount your marine radar in a place that gives it a maximum range with minimum blind spots. In addition, you should always mount the marine radar system above head height, so that you and your passengers have minimal contact with the electromagnetic energy emitted.

Normally, people mount their boat radar system at the highest point on the boat, where it has an unobstructed 360-degree view. You should avoid mounting your boat radar system near large masts, horizontal spreaders, or other solid objects because it can cause a blind spot for your marine radar.

You should also make sure that your model comes with a mounting kit. Most manufacturers include a mounting kit in the package, but not all marine radar systems are sold with the same accessories. You should check before you purchase if one is included. If there isn’t, the manufacturer should have a mounting kit available for separate purchase.

Marine radars are expensive investments that could end up saving your life. You want to ensure that you are buying the best boat radar, which means it has top-level build quality and functionality. While it’s not the only factor, looking at the brand of the marine radar can be an indicator of device quality. You should also read radar reviews to get a feel for how well the system works and if it’s durable and reliable.

Frequency of Use

The frequency of use depends on what conditions you use your boat in. If you leave the floating dock early in the morning or stay the night, you want a marine radar with a higher power and more features to keep you safe. If you want to use your marine radar to go fishing, you will want a radar that can track targets that are far away and also track weather systems that are occurring near your boat so that you don’t get caught by surprise.

If you aren’t out on your boat for long periods of time, you can invest in a marine radar with just the essential features. Most entry-level marine radar systems will have you safely navigating in poor weather and around objects, without paying for features you won’t ever use.

Weight and Size

The weight and size of a marine radar may affect which model you should buy. Always make sure that your marine radar fits your boat (before you actually install it). Some radars will not fit properly in the space you want to mount it, so you should look for a different size.

Marine radars can also be heavy. You want to ensure that the place you mount it can safely support its weight, without the risk of falling off. Smaller radars weigh less and may be able to be mounted on a mast.

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Most marine radars have a reasonable height, but you should always be aware of how tall your marine radar is. You want to ensure you don’t accidentally run it into anything while you are cruising around. Another important aspect here is the height of the antenna. Antenna height will be a factor in how far your radar can see.

Marine radars are normally limited in sight by the curvature of the Earth’s surface and the height of the target, but the antenna height can help your radar see further. However, if you need a radar for small boats, you shouldn’t invest in a long-distance model because your boat won’t have the height needed for the radar to see its maximum distance.

Most marine radars will pulse with a broadcast range of 1-6 degrees. The narrower the beam width is, the more fixated the vibrations of the radar become. A narrower beamwidth will give better results in terms of target differentiation and more precise bearings.

However, keep in mind that a narrower beam width will restrict visibility in close quarters because the beam correlates to the minimum target width.

Multi-function System or Stand-alone Radar?

Multi-function systems may have a few more features but they are also more expensive. One of the features found on multi-function systems is color displays. They provide a broad spectrum of abilities and are also better at covering your electronic charts. Keep in mind, that if one part of your multi-function system doesn’t work, the entire device will not work (including the radar).

Stand-alone radars are great if you prefer dedicated displays and don’t mind seeing without color. They also have fewer features that can fail, which means less maintenance and greater reliability.

Q: What Is A Marine Radar? How Do They Work?

Marine radar systems are made specifically for ships and boats to detect other ships, boats, land obstacles, or objects on the water. Marine radars use electric signals and a rotating antenna to send out narrow beams of microwaves across the surface of the water. If there are objects in the water, they disturb the narrow beams and show up scanned into the radar as an obstacle to avoid.

Boat radars can specifically be used for collision avoidance, which keeps your boat safe. Most marine radars are built for use in the ocean and some have multiple features, and act like fish finders, in the same device. Keep in mind that marine radars also need a power source, coming from marine batteries that run your boat. They are an important safety component for your boat, alongside other safety devices like VHF marine radios and marine GPS systems.

Q: Does A Marine Radar Come With HD Transducer, Cables, And Mounting Kit?

Yes, the majority of marine radars come with an HD transducer and cables. As for the mounting kit, it depends on the manufacturer and the model of your radar. Not all radars come with the same accessories upon purchase, this varies by brand and model.

Before purchasing, you should check what is included in the box. It should be indicated on the packaging whether a mounting kit is included and if it isn’t, it should say how you can purchase that separately. You can also check the product website to see what you’re getting and where to purchase all the parts you need for your radar.

Q: How To Maintain A Marine Radar?

A marine radar doesn’t need to be cleaned often, but a quick wipe down can keep it looking like new. You can maintain a sailboat radar and yacht radars as you would the rest of your vessel. Generally speaking, marine radars are built tough. They are made of anti-corrosive materials which make them resistant to the changing weather conditions and salt from the water.

To eliminate most problems, you must properly mount the radar. If you ever have problems with the wiring or hardware, it is best to consult the user’s manual or guide. If you aren’t confident in fixing the problem, contact the company or someone certified to do repairs.

Q: What Can A Radar Detect?

A boat radar can detect ships, boats, and other vessels that are within radar range. It can also detect floating and static objects in the water, so it’s easier to avoid them. Keep in mind that the distance and size limit depends on the power of your radar. Depending on the model, your radar can also show you the range and moving speed of objects.

Q: Does Rain Affect Radar?

Yes to a degree. While the radar still works, rain absorbs the signals and significantly reduces the range of your radar. This means that boats and objects must be much closer for the system to pick them up. In addition, rain can also reflect a certain percentage of the signal, which ‘clutters’ the radar and masks other objects. This does allow you to pick up rain and track storms as they approach you with the radar. No longer will a storm creep up on you in the dark of the night as the radar will warn you before the storm's arrival of its presence. 

Q: What Frequency Is Marine Radar?

Most marine radars work with X-band (10GHz) or S-band (3GHz) frequencies. The higher frequency of the X-band is better at giving sharper images at a higher resolution, while the S-band performs better in bad weather conditions like rain and fog. In addition, the S-band is slightly better for identifying and tracking targets on the radar.

Q: Is Marine Radar Dangerous?

No, not really. This is a common misconception. Based on numerous research over the years, radio frequencies used by marine radars don’t cause any damage to human tissue. This means that boat radars won’t give you cancer or cause any health issues. The waves can cause harmless heating on the skin, but not much else.

Globo Surf Overview

As one of the crucial pieces in boating safety , a top-rated radar can help you avoid any collisions and maintain a safe voyage. By investing in a marine radar, you can scan the water ahead and be certain of your location. On top of this, the best boat radars will even have extra features that will make your time on the water even better. Hopefully, our guide has made your decision easier, so you can be confident when choosing a model for your boat.

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Do you own one of the marine radars that made it onto our list? Let us know how it has worked for your outdoor needs in the comments section below.

11 radar reflectors tested : Not all models are really easy to see

Alexander Worms

 ·  14.05.2023

This is how we tested

11 radar reflectors in the test: the results, how radar reflectors work, radar technology: broadband or magnetron radar.

Who needs a passive radar reflector in the age of AIS? Thanks to modern electronics, you are highly visible on the screens, certainly on those of commercial shipping. Well, the question seems justified at first glance. On closer inspection, however, the answer is clear: everyone who is on the water with commercial shipping needs such a device. This is because AIS technology is dependent on a power supply - if this fails, the yacht is no longer visible. Passive radar reflectors work at all times. What's more, there are some areas, such as the Waddenzee in the Netherlands, where a radar reflector is simply mandatory.

Not much has changed in terms of products in recent years. On the market, the Tin cube which Tubes and the Echomax . There was also a device called Trilens. This reflector is now sold under the name 3Lenzz offered again.

But how good is the performance of the reflectors in practice and when it is not a question of being seen by large devices on the bridge of a commercial vessel, but by a less powerful yacht radar? First of all, it is difficult to make generalisations and the conclusions must be formulated precisely.

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The problem is explained using an example: the 3Lenzz consists of three spheres that are mounted at an angle of 120 degrees to each other. A test by the British coastguard had already shown that it has a blind spot every 120 degrees. If radar signals hit this blind spot, the echo on the screen disappears. All reflectors have such blind spots, to a greater or lesser extent. During our test, we recognised the 3Lenzz by the fact that the echo was clearly visible, disappeared for a few orbits and then reappeared. The test boat was obviously close to a blind spot on the reflector. In practice, this would be the case when approaching with an exact bearing, for example when a ship is travelling towards an anchor berth that is not swinging. However, if the angle between the two changes by just a few degrees, there is an echo.

The conclusion that it doesn't work well because it was sometimes poorly visible in the test would not be the whole truth. The echoes were clear when measured from a different position. The conclusion is therefore that the 3Lenzz delivers good results with changing courses of approach and only shows weaknesses at three points on the full circle.

To simulate the situation on a sailing boat, we measured each reflector vertically and at an angle of 30 degrees. Here, too, some models showed weaknesses. In particular, the models with an already small reflective surface sometimes collapsed significantly. However, even the weakest reflector ensured that our test pontoon appeared on the radar screen.

The echo of each reflector was measured a total of eight times - from a distance of 0.5 and 1.5 nautical miles, vertically and at an angle of 30 degrees, using a modern broadband radar and a conventional magnetron radar. The displays of the broadband radars are shown in the individual test images. Measurements were taken from a motorboat on which both antennas were installed. The reflectors were installed at a height of around three metres on a pontoon on a wooden mast, which could also be tilted. The results were then saved using a screenshot on the Garmin devices used; these were radars commonly used on yachts. We optimised the settings of the radar unit for the medium-sized sheet metal reflector and did not change them in the further course of the test in order to ensure the same conditions for all reflectors. We only tested the two inflatable reflectors in an upright position, as these are usually suspended.

Plastimo sheet metal small

At close range, it is always easily recognisable on both devices. At greater distances, it is not visible in a vertical position; echoes only became visible when the mast was tilted. For an optimum echo, the reflector must be mounted in the rain catcher position, but this can only be the case either in an upright or tilted (in the test) position. Mounting is difficult, the metal sheets are sharp-edged.

• Weight: 0.45 kg
• Reflective surface, total: 3.0 m²
• Price: 33,92 €
• Distribution: Bukh Bremen
• Dimensions: 215 x 215 x 280 mm
• Rating: ***

Plastimo sheet metal RORC

The big brother is consistently easier to recognise on both devices at close range. From a greater distance, the solid-state radar struggles with reproduction. On the radar, the reflector cannot be seen in an upright position; when the boat is heeled over, it blends in with the tug echo. The reflector is very large. There is no opening on the inside to feed a stage through; the installation of the reflector on a sailing boat is unclear.

• Weight: 1.0 kg
• Reflective surface, total: 7.0 m²
• Price: 52,48 €
• Dimensions: 340 x 340 x 470 mm

Echomax EM 12

Good visibility at both distances. A rather weak echo when measured upright on the magnetron radar. At the greater distance, the reflector also clearly stands out from the echo of the tug. Mounting is easy, a foot helps with mounting on the spreader, for example. A spherical cut-out in the centre makes mounting on the stay easier as it can be threaded through. The plates are not sharp-edged.

• Weight: 0.73 kg
• Reflective surface, total: 5.5 m²
• Price: 80,50 €
• Distribution: Lindemann KG
• Dimensions: 360 mm

The rod is only visible as an echo from a short distance, but it is always equally good, regardless of whether it is vertical or inclined. At greater distances, it is invisible on the semiconductor radar. Only the magnetron radar can detect an echo in a vertical position. The reflector is lightweight and easy to install. However, it is more expensive than the similarly performing Plastimo tube. A base for mounting on deck is available.

• Weight: 0.38 kg
• Reflective surface, total: 2.0 m²
• Price: 49 € (as of 8/2022)
• Distribution: Lankhorst Hohorst
• Dimensions: 50 x 570 mm

Plastimo pipe small

At close range, the Plastimo tube is reasonably visible, but the echoes are visibly weaker compared to the Mobri tube. At greater distances, an echo is only recognisable in a vertical position and on the semiconductor radar. The tube therefore reacts sensitively to heeling. Some of the aluminium plates inside are severely bent and not aligned at right angles. Lightest reflector in the test field.

• Weight: 0.25 kg
• Reflective surface, total. 2,0 m²
• Price. 36,53 €
• Dimensions: 50 x 580 mm

Same picture as its little brother: no visibility at a distance of 1.5 nautical miles. Only the magnetron radar in vertical position shows a slight echo. However, the Mobri is clearly visible at close range. The twice as large reflective surface compared to the smaller version does not result in a better echo. The extra weight and price are therefore not worth it. Also available with base.

• Weight: 0.88 kg
• Reflective surface, total: 4.0 m²
• Price: € 95 (as of 8/2022)
• Dimensions: 100 x 590 mm

Plastimo pipe large

The same picture as with the competitors in tube form: At short distances, the image is usually good, although very small echoes occur with magnetron radar; at greater distances, they are almost completely invisible. Here too, the larger reflective surface does not result in a better echo. The aluminium plates inside are also bent and not mounted at right angles. The workmanship does not look very high quality due to the burrs on the plastic.

• Weight: 0.90 kg
• Price: 62,83 €

Echomax 230 BR

The very large device is the only reflector that produces an echo under all conditions and regardless of the radar technology. However, these are sometimes rather weak, especially if the reflector is tilted. If the reflector is upright, very good echoes are consistently displayed. The Echomax is very large and heavy, the required mounting bracket costs extra, but is very solid. Rather for large ships.

• Weight: 2.5 kg
• Reflective surface, total: 24 m²
• Price: 301,07 €
• Dimensions: 245 x 610 mm
• Evaluation: ****

The 3Lenzz shows consistently good echoes at short distances. At greater distances, reliable echoes are only visible when the device is mounted vertically. If the device is tilted, a strong echo is only visible about every third round, but it is reliably visible in the same place. This is probably a consequence of the three-part design, see running text. The 3Lenzz is the most expensive and heaviest reflector in the test.

• Price: 389 €
• Distribution: Northwest radio
• Dimensions: 300 x 300 x 150 mm

Echomax EM230i

Very good and clear echoes throughout thanks to the large projection surface. Due to the suspended mounting, the reflector is always aligned vertically, so no curved values were measured. Due to its low weight, it is the ideal addition for small cruisers who only want to use the reflector when necessary. As with the ball, we recommend replacing the reflector after five years. However, it is very expensive in comparison.

• Weight: 0.42 kg
• Reflective surface, total: 17 m²
• Price: 296 €
• Dimensions: 300 x 750 mm

Plastimo inflatable

Good visibility at short distances, barely visible at greater distances. As the ball always hangs vertically when it is hoisted on a flag halyard, for example, there were no measurements when tilted. Rather poor echoes despite the comparatively large reflective surface. Unfortunately, the ball was leaking, so that constant re-inflation was necessary. The reflector is very large and light when inflated. Expensive.

• Weight: 0.6 kg
• Reflective surface: 10 m²
• Price: 268,94 €
• Dimensions: 615 mm

It used to be like this: after the radar unit was switched on, it took quite a while for the first image to be taken. This was because the electron beam tube, the magnetron, had to heat up first. This took time and required a lot of energy. Operating the devices also swallowed up a lot of electricity. So, on long patrols in areas with little traffic, it was only allowed to carry out a sweep every few minutes. If nothing was seen, the device switched back to stand-by mode and only used the energy required to keep the tube at the right temperature.

Modern radar devices solve this differently. There, it is not tubes that generate the signal, but semiconductors. They can also generate signals of different wavelengths. As a result, the radar is available as soon as it is switched on and requires much less power. In addition, the radiation is significantly lower, which is good for the health of the people on board. A broadband or semiconductor radar generates roughly the same radiation as a smartphone. Due to the different wavelengths, the radar can generate even more information from the reflected signals. So-called Doppler radars quickly recognise whether an echo is approaching or moving away and in which direction it is doing so without the need for complex plotting. This makes it possible to calculate the point of closest approach and the time until then.

Most read in category Equipment

Which Radar Reflector?

Tri-lens – From what I understand this radar reflector offers some of the best all around performance for the price. Typically you will see these mounted to the face of the mast. This presents an inherent problem for us sailboat riggers; it is in the path of the jib which is inevitably going to try and wipe it off of the front of the mast. This is especially a problem on boats which utilize overlapping headsails, don’t have forward lower shrouds, don’t have a mast mounted radar and guard (as pictured above), have aft swept spreaders, or use a permanent Stay-sail stay to help protect this vulnerable part from getting knocked off. These reflectors have recently been modified with a second mounting bracket on top for a sturdier mount (not pictured). This second bracket has made us more confident in installing these, as there is a big difference in how sturdy the unit is. Keep in mind the plastic cover of these lenses are well built and therefore very heavy. You’ll want to make sure that you have taken every precaution to ensure that it won’t come crashing down on your head! Echo Master – The most tried and trued of all of the reflectors. Many will argue that even though this isn’t the “fairest of them all”, it works pretty darn well. Especially when mounted in the coined “catch rain position” (pictured above), using Davis’ Echomaster Hanging Mount , optional. The problem is how do you mount the thing without it flailing about like a wild, out-of-control disco ball. See the gallery below for how we achieve a good way for these to be mounted beneath the first set of spreaders…

Although there are many more products out there worth researching and we will gladly always explore new products and options, these are the brands that we have had most of our experience installing. Need more information or help installing a radar reflector? If in doubt, don’t forget to  Contact your local rigger for assistance.

Do you have any experiences with radar reflectors? Don’t forget to  Share your thoughts below and thanks for the read.

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23 Comments

Have you seen these https://www.leadingedgepower.com/shop/products/wind-turbines/le-v50-vertical-axis-wind-turbine-1013843.html They are a bit heavy, and need need strong brackets, a simple ‘guard’ could be made to protect the sail- but the spinning blades – besides producing power – are supposed to be highly effective in reflecting Radar signals.

Thanks for the useful article! Buying a boat equipped with a Mobri and will consider adding a tri-lens for passages. Also AIS is a must! Are you still giving away t-shirts? I’d love one if so.

Thanks for the read and the kind words Rory. We are OUT of shirts!! Sorry, I wish I had one for you. Keep checking in with us, we’re always getting new swag for giveaways.

Just a comment from another industry: I fly for the airlines and all jets these days are equipped with TCAS, or the traffic collision avoidance system. This is an active collision avoidance system where TCAS equipped aircraft talk to the installations on other aircraft sharing altitude and airspeed information. If the TCAS computer senses that it’s safe zone has been breached it will provide the two aircraft in question “traffic advisories” along with an audible warning. If no action is taken and the two jets continue to close on each other, a “resolution advisory” is issued giving the two pilots opposite avoidance instructions to avoid a crash. This has virtually eliminated midair collisions between commercial aircraft.

Of course, you have a little less time to see and react when the closure rate is 1000 knots, but it is a tremendous system.

Given my experience with TCAS, I’d really recommend an active collision avoidance system, particularly if you spend any time around commercial shipping regardless of the prevalance of fog in your area.

As far as trying to McGuyver something, I would think that the lids of tin cans would work better than tin foil. In fact, if you had a few of them and some reflective tape you could probably come up with an approximation of an Echomaster in a pinch.

Thanks for the comment.

There is a collision avoidance system for boats, and although this is good, many boaters are cheap. I like the tin can idea, going to do that. It is difficult enough to afford the basic safety gear. My step dad had no gps or electronics in his day. The fanciest piece of equipment he had besides his sextant was an oil lamp which he gave me for my boat. I use it whenever I feel like getting a headache. Many boats also have proximity alarms, etc. It pays to have as many of these safeties as possible. (as affordable) I have a good friend that sailed the oceans solo for very may years. He is in his 80’s and I just convinced him to get a GPS a few years ago. He also asked me to find him a woman online, so if you know of someone… My question would be, do any of these barrel or inflatable reflectors double as mast flotation in case of capsize?

Haha! I have my own troubles with that Alain. Even though the Firdell Blipper has a very buoyant look I wouldn’t trust it as my anti-capsize device. Perhaps that’s what any of these are good for. Seems rather controversial…this whole radar reflector business.

Thank you for the chuckle and for taking the time.

Yes the Echomaster is quite effective if hung in the RAIN CATCH ATTITUDE, that , despite your claim, is NOT shown. Hung as shown by one corner is a rain SHEDDING position! The reflector needs 2-3 attachments so a ‘ CUP’ is formed at the top…hence ‘rain catch position’. When hung this way the other reflecting surfaces of the side pockets are more likely to bounce the radar signal back to its source (acting like a prism) than a flat vertical plane which are unlikely to be square on to the signal source Tilting will make it worse where the rain catch angles will still work. Area is important as is the flatness of the surfaces and accurate corner assembly. Regards, Lew .

Thanks for commenting and all of your points. You are correct the gallery image depicted does not employ the “Catch Rain Position”. This is noted below the gallery collection, but it is a little hard to read, I will put it at the top. Thanks, this is once of the many reasons I encourage commentors. The generic product image from Echomaster does show the unit in this position. I will add an image caption. Davis actually makes a specific spring style hanging (instead of the bridle) that is rigged through the center of the Echomaster so that it can be hoisted in the coined “Catch Rain” position… this is also shown (if you look carefully) in the Echomaster product image in the article. On the Davis site, the “Catch Rain” hanging mount is described as…

“#153 Deluxe Hanging Echomaster Anodized aluminum plates. Comes with hanging mount system to suspend unit from mast or rigging in perfect “catch rain” position. Vinyl storage case included. #157 Surface Mount System can be purchased separately”

As the article suggests we are no experts on radar reflectors or their performance, but just wanted to speak to some of the more functional ways of rigging/installing the various products so that they do not interfere with boats sailing systems as well as provide safety for the crew below on decks. Therefore, it is our belief that once the reader chooses the radar reflector(s) and follows the manufacturers guidelines along with our points on mounting them to a sailboat mast, they will have a product that is not only functional but will provide the user with years of trouble free use.

Readers are always urged to get more product specific information directly form the manufacturer. You can get more information on how to properly execute the Echomaster here… .

Thanks for the read.

The Radar reflector is one element of the measures boat owners should take to ensure that they can see other marine traffic and most importantly be seen by other marine traffic. It is clear from the Qinetic report on radar reflectors following the tragic loss of the yacht Ouzo south of the Isle of Wight on the 20/21 August 2006 that boat owners need to select a radar reflector with the biggest possible reflecting area to ensure that they can be seen by radar equipped ships. Furthermore the report confirms that the performance of the Echomaster and Mobri is rather poor and states that poor solutions whilst giving owners piece of mind may in fact do little to improve the boat’s visibility on radar! Cost and ease of installation should be of no importance in the debate. Consequently I would select the Tri-Lens readar reflector if I was selecting a passive reflector but a much better option (confirmed by the Qinectic report) is an dual band (X and S) active reflector such as the Echomax Radar Target Enhances (Echomax Active XS) or the SEA-ME Dual Band which are highly recommended in the Qinetic report..

I have a Firdell Blipper in the top of my mast – above the forestay, so out of the way of any sail. It has been there for 20 years now so your comments on the brackets sound strange to me. I sail on the very busy North Sea and I have never heard of ships or coastguard stations unable to find me on their radar. As a matter of fact I have hardly ever had to alter course when crossing shipping lanes because the other ships see me long before I see them and it seems they think my boat is much bigger then it really is (only 22 ft). So I have great confidence in my Firdell Blipper and already have one handy to mount on my next boat.

It is good to hear a success story with one of these. As the article says there is much controversy surrounding the many different radar reflector options. These are just the view points as we’ve experienced them. Putting the reflector above the headstay is a great idea…probably why it has lasted so long and works so well. There is nothing to mess with it up there and from what I understand the higher the better.

In regards to performance we know really very little hence the three articles cited that conducted testing on the various products.

That’s a big reflector for such a small boat no? What type of 22′ sailboat is this?

Thank you for taking the time. ~T.R.C.

I build n deliver boats in the gulf of mexico north and south the echo master is always in my delivery bag i dont trust anything else even if the boat im delivering has one i put my spare up also i keep mine polished for better radar reflection

That’s a smart boat delivery captain in my book. Thanks for taking the time Rick!

The Canadian Coast Guard and Practical Sailor also did test years ago and the small tubular reflectors did very poorly. We formerly operated a charter fleet and I would never install a Plastimo or Mobri. After a strong wind one night, I came onto the float and found pieces of a tubular reflector which had shattered.

They are easy to mount, however virtually useless, especially when heeled. Viki. the bag of foil would be of no help. You need precise 90 degree corners to reflect the radar signal.

Thanks for the comment. No question on the Mobri having tested poorly, all three of the linked sites say so too. As I said we just like these from a rigging point of view. Perhaps mounting two, as we always do, would improve some of these test results? Also, in my experience these are usually improperly mounted….almost always, hence they can come crashing down; this is the case with anything though, right? Not a one, in ten years of rigging offshore boats has come crashing down at least unbeknownst to me ;-0) Remember, we feel the key with these is to have them installed on a diagonal shroud so that when the boat heels at least one of the reflectors sits in the vertical position. I believe when used in conjunction with and properly rigged Echomaster beneath the spreader, you are really increasing your chances of being seen. In our opinion, this combination is probably the best possible set up for double spreader masts with aft swept spreaders, overlapping headsails, forward lowers, mast mounted radars with guards, or inner forestays, to help protect the hardware from becoming dislodged or damaged by the tacking sail.

Modern boats with non-overlapping headsails have much less issue here.

Having said that, especially if you do have a more traditional mast with fore and aft lowers, inner forestays, or radar with a guard, we have grown partial to the Rozendal Trilens. This seems to be a top performer in regards to the testing conducted by the various agencies. Of course conditions, type of radar scanner, heel, and more, are all factors in how well they test. The Rozendal Trilens is a very good quality reflector and now that it has the second mounting bracket, is a sturdier option for the front of sailboat mast.

What are some other good brands out there worth checking out for sailboat mast mounted radar reflectors?

Great post! We are in the market for a radar reflector. We don’t get much fog here in the South Island of New Zealand, however we were recently sailing down the coast on an overnight trip and when the sun rose we found we were completely shrouded in fog – and had no radar or radar reflector! After posting our plight on Facebook a friend suggested we hoist a bag of screwed up tin foil up the mast, which we subsequently did. It made us feel a bit better, but not sure that it was actually effective at all! I think we will get an echo master to have on board just in case on our next coastal passage. But for our next boat – the one we sail around the world in, the Mobri does look very sleek.

Thanks Viki! We have to send you a shirt or something, you are a great follower, our best for sure. Yes on the Echomaster. And 2 Mobri’s or a Tri-lens would be my recommendatio for the more permanent solution.

Email us for a FREE shirt ! Just tell me you and your husband’s size and shipping address (American Sizes, i.e. they may be a bit BIG lol, but they’ll shrink too)

Thanks for commenting and Happy Sailing! ~T.R.C.

Yay thank you! Do you think the tin foil up the mast would work? I have had a mixed reaction from people we told as to whether they thought it would work or not. It made us feel better anyway. I will send you a message. Love your blog :)

Lol…I really don’t know but….no I don’t think so.

Ha ha – damn! Ah well at least we didn’t get run over… ;)

Just don’t fold the foil into the shape of a stealth fighter.

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