Choosing a marine GPS for your boat is a daunting, technical task which involves sorting through reviews, watching videos and making multiple runs to your nearest boat shop or outdoor recreation store.
But before getting overwhelmed, you should take a few moments to decide how you plan to use your GPS. This information can point you directly to the right GPS.
Why You Need a GPS on Your Boat
It can save you from disasters and keep you out of the way of storms. Even if you’re not in harm’s way, it can help guide you through harbors when returning to the marinas.
The Right GPS for Your Boat
What do you want?
The bells and whistles: Do you really need them all?
When you visit boat shows, manufacturers demonstrate the newest, most technologically-advanced models. They’ll offer enough features to make your head spin, and somehow, all of these features sound necessary for your boating excursions.
Beyond that, each manufacturer has previous years’ models to choose from with different assortments of features—so how the heck do you decide? Instead of giving you a review, I want to break down the specifications you need to pay attention to based on your personal needs.
How many satellites
Typically, GPS specs will tell you that they pull data from 12 to 24 satellites.
The more satellites it pulls from, the stronger the accuracy, but most GPS systems only need three satellites to pull from to determine your location anyways.
Sizes and styles of GPS
Handheld GPS are able to run on 12-volt power, should you need to plug in. For handhelds, you’ll need to pay attention to battery life. Can it last a full day’s excursion or do you need it to last longer? If you need longer battery life, most handheld units are accompanied by a 12-volt cigarette lighter cable.
If you have vision troubles or are far-sighted, a smaller handheld GPS device might not be large enough to tell you what’s going on around you.
Portable GPS often have a larger six-inch screen, which enables touchscreen operations. Portables can also be used in both your car and boat.
If you require a larger screen, invest in a dash mounted GPS instead. You can place the dash mounted GPS near the helm for easy access and coverage from your bimini top. Although, on the flip side, if you have a pontoon with a bimini top, you may need to install an external antenna for extra reception strength.
Built-in antennas are compact, but won’t give you the reception that you need to see weather forecasts and stronger mapping accuracy. Find a GPS with an external antenna (or at least an antenna port).
- Resolution — No mater what size GPS screen you get, be sure it has a decent resolution. In my book, it’s more about resolution than size. Sometimes I find that even smaller screens with higher resolution are easier to read than big screens with poor resolution. You’ll still find yourself squinting if you’ve got a large screen with low resolution. On those smaller screens, you can always adjust screen brightness to make chart symbols contrasted enough to see.
- Monochrome vs color — Good old-fashioned, black-and-white screens are cheaper, of course. And you may think this isn’t a big deal, but for me, I have a hard time reading them. Not mention, these don’t indicate red and green buoys and other important navigation colors.
- Sunlight readability — During daylight and under bright sun, sunlight readability mode comes in handy and makes the screen much easier to read. The same goes with night watch mode. See if the GPS specs mention these features.
Let me just say that, while it’s very common for boaters to install GPS apps on their smartphones and portable pads, I’ve found that these apps certainly have disadvantages, especially on long trips. Just for starters, they’re harder to read, less reliable and kill your battery life.
Fishfinder or depth sounder compatibility
If you’re an angler or sport fisherman, you need this feature. Chances are, you already own a fishfinder or depth sounder, so don’t order and invest in a GPS that’s incompatible! You’ll be very disappointed.
If you already own a fishfinder, know that marine GPS units often come equipped already. You may well improve the whole experience with one of these devices. GPS units have the ability to zoom in and inspect deeper waters to explore marine life along the floor. Some GPS also have omnidirectional antenna and sonar, making it easier to find fish through weeds and underwater habitats.
Internal memory updates
Chart cartridges mean you won’t necessarily have extensive charts of entire coastal areas. This might be okay for you if you never plan to take your boat elsewhere, or if you know your local lake like the back of your hand.
Do you enjoy taking your vessel to unknown territory? Then it’s wise to have a GPS that can project the area where you plan to go cruising. For this, you’ll need a device that can download updated charts straight off your home computer or simply have Wi-Fi access within itself. So, look for computer connection or Wi-Fi capability.
Do you take your boat on the open seas or just a local lake? Non-mapping can be suitable for smaller lakes where you know your surroundings extremely well. In larger lakes and oceans, you’ll need a more advanced GPS mapping system.
- Non-mapping — This is as basic as it comes. May only show latitude and longitude, a compass and your travel distance.
- Standard basemap — For lakes, rivers, shorelines, and even cities with larger ports and marinas. Base mapping systems are what you’re familiar with using in cars, and you’ll have more features for these terrains.
- Detailed mapping — As advanced as they come. These give you weather forecast patterns, have 3D viewing capabilities and show underwater terrains.
Top-notch Boat GPS Manufacturers to Consider
Keeping in mind that your boating style may vary and you may require different features, I still want to provide a few models of major GPS manufacturers for you to look out for. This should provide you with a good launching point to explore for yourself.
- With the integration of a 10Hz GPS/GLONASS receiver, the 527 refreshes position and heading up to 10 times per second
- It displays constant and fluid on-screen location and proves to be incredibly accurate when marking and navigating to any one of 5,000 user-created waypoints
- It also has wireless connectivity, giving you the opportunity to connect and access marine-specific apps via smartphone or tablet
- includes worldwide basemap; US BlueChart g2 and US LakeVu HD data card
Garmin GPSMAP 547 is a great option for freshwater boaters, is a relatively affordable GPS model and integrates with smartphones and tablet devices.
- Provides connectivity with compatible Garmin chart plotters and other devices to provide autopilot control, remote waypoint marking, data streaming including speed, depth, temperature and wind
- Sail Racing assistance includes virtual starting line, distance to start line, race countdown timer, and tack assist. Display size:1.2”(30.4 mm)diameter. Physical size:47 x 47 x 15.5 mm(1.85" x 1.85" x 0.6").
- Built-in Fusion-Link Lite App controls connected Stereo Active products, as well as other ANT enabled stereo models (RA70/BB100);Case material :fiber-reinforced polymer
- Includes Elevate wrist-based heart rate, built-in GPS and features QuickFit band system, stainless-steel bezel, buttons and rear case and sapphire lens
- Comes with both silicone and stainless-steel QuickFit bands.Battery performance: up to 2 weeks in smartwatch mode (depending on settings), up to 24 hours in GPS mode and up to 60 hours in UltraTrac battery saver mode
Garmin even carries their own integrating GPS marine smartwatch, the Garmin Quatix 5 Sapphire, which is pretty cool and compact gadget.
- A leap into the future of sonar Dragonfly 7 Pro employs true wide Spectrum CHIRP Technology where sonar signals are transmitted into the water allowing Dragonfly to interpret more detail target more fish and image structure with unmatched clarity
- CHIRP DownVision will change your underwater view with incredibly clear photo like sonar images that surpass ordinary imaging sonars with superior deep water performance to 600ft (180M) and reliable high speed bottom tracking
- Dragonfly 7 Pro has GPS built in and comes with navioncs + by navionics for charts. Waterproofing Standard: IPX6 and IPX7
- Dragonfly 7 Pro features built in Wi-Fi so anglers can stream Dragonfly sonar data right to their smartphone or tablet with the Raymarine Wi-Fish mobile app
- Dragonfly is engineered with optical bonding LCD display Technology that are all weather and deliver Brighter colors sharper contrast and are guaranteed to never fog up
The Raymarine Dragonfly 7 Pro is an awesome GPS/Fishfinder combo unit for avid angler and fisherman. With Spectrum Chirp technology, you can see amazing underwater details. Plus, it has built-in WiFi that sends sonar data to your phone or tablet (using the Raymarine Wi-Fish app).
- Built-in high sensitivity GPS receiver and also has dual chart reader slots for Navionics charts on micro SD card
- Networking Powerhouse with built-in Wi-Fi and Bluetooth wireless networking
- Networking including seatalk-hs, sea talk-ng, NMEA2000, NMEA 0183 and one composite video Input
- Network up to 6 displays together
But if you aren’t just an angler and need a more complex chartplotter system, you’ll need to look at a more advanced model. Check out the Raymarine c95 instead. Although not as affordable as most, this GPS does provide the charts you need, sonar and even night vision—all on a larger nine-inch screen.
- 000-10778-001 HDS-7 Gen2 Touch Insight 83/200 & Lowrance Fishfinders
If you’re tempted by the Raymarine c95, also take into consideration the Lowrance HDS-7 Gen2. It has just about every feature you could wish for in a GPS chartplotter and has excellent fishfinding capabilities such as sidescan and downscan technology, capturing pockets of cooler waters where the fish can be found hiding.
- Same Day Shipping on Request
- Best Value and Performance in its Class
- 15-Years as premier solution provider
- Complimentary White Glove Service - Just-Ask-We-Take-Care-of-It
Simrad Go 7 Xse is a nice touchscreen with large collection of basemap charts. I find the interface very user-friendly, even capable of saving fishing hotspot positions you want to come back to another day.
Choosing the Right GPS for Your Boat
Just like you should test drive a boat before buying, you should also demo a GPS on a boat (and preferably your own). If you can, get your hands on a buddies GPS and give it a whirl, see what you like and dislike. Be sure that when you test out GPS systems, that it’s unintuitive to you and buttons and menus easy to navigate and user-friendly.
Lastly, you would think this is inherent in anything labeled as “marine,” but pay close attention to specs regarding water resistance. Almost all GPS units are waterproof, but you should know there’s a difference in being waterproof and water resistant. Find a GPS that says it’s fully water resistant.
Purchasing a GPS system can leave you with a bit of sticker shock. Just know that since the invention of the global positioning systems, it has saved many lives and prevented countless boating accidents.
I hope you find this breakdown informative and that it gets you started on the right foot to find the best GPS for boating.
Brette DeVore is a freelance content writer, editor and marketer. A former interior designer with a love for travel and the outdoors, her specialties range from hospitality and lifestyle to tourism and recreation. Catch her camping beneath the stars, reading by the bonfire.