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If you love being out on the water, you know that navigation is about more than getting from A to B — it’s about safety, confidence, and making the most of every outing. A good marine GPS or chartplotter is like having a seasoned captain in your console: it reads the charts, tracks your position, marks fishy hotspots, and helps you avoid hazards. But where should you buy one in the US, and how do you pick the right unit?
You might be tempted to rely on a smartphone or car GPS, but marine chartplotters are built for the sea. They combine specialized nautical charts, high-brightness displays you can read in sunlight, and rugged, waterproof housings. Think of a chartplotter as a toolbox designed specifically for boating — it has tools your phone doesn’t.
Chartplotters often include features like built-in marine charts (C-MAP, Navionics, BlueChart), NMEA 2000 networking for sensors and autopilots, sonar integration, and waypoint management. These are not just bells and whistles — they’re practical tools that turn navigation into second nature.
On a boat, equipment gets splashed, baked by sun, and jostled by waves. Marine units are typically rated to resist water and corrosion, with housings that shrug off spray and salt. If you want gear that feels at home at sea, durability is a must.
When it comes to buying, your choice of retailer matters. Some stores specialize in marine electronics and offer installation help and expert advice, while others focus on value or nationwide shipping. Below are trusted US retailers where you can find chartplotters, accessories, and pro guidance.
West Marine is one of the most recognizable names in boating supplies. They stock major chartplotter brands — Garmin, Raymarine, Lowrance — and carry accessories like transducers, mounts, and NMEA 2000 cables. Many West Marine stores offer installation clinics and tech help, which is ideal if you want hands-on support when choosing the right unit.
Bass Pro Shops and Cabela’s are big-box outdoor retailers that cater to anglers and boaters with a wide selection of electronics. They often bundle chartplotters with mapping cards or fishfinder combos, making them a solid choice for anglers looking to match sonar to their navigation system. Expect seasonal promotions, especially before fishing seasons.
Defender specializes in marine gear and has a deep selection of chartplotters, from entry-level units to high-end multifunction displays. Defender is known for competitive pricing and frequent promotions, plus a selection of hard-to-find marine accessories. If you’re outfitting a boat and want components beyond the head unit, Defender is worth checking.
Fisheries Supply caters to serious boat owners and commercial customers. Their marine electronics section includes rugged chartplotters and professional-grade accessories. Fisheries Supply is a good option if you need gear rated for demanding use or if you’re installing a system on a larger vessel.
Amazon offers convenience and a massive product selection, including Garmin, Lowrance, Simrad, and Raymarine. While you’ll find good deals and quick shipping, be mindful of purchasing from authorized dealers to ensure warranty coverage. Customer reviews can help, but pair them with spec checks before committing.
Walmart carries basic marine GPS units and fishfinder combos for budget-conscious buyers. If you’re outfitting a smaller boat and want a straightforward chartplotter without premium features, Walmart can be a practical starting point. Just be sure the unit supports the mapping and networking features you need.
Best Buy sometimes stocks marine electronics online and in larger stores, especially popular brands like Garmin. While not as specialized as a marine-only retailer, Best Buy offers protection plans and easy returns — useful if you prefer brick-and-mortar purchase with national coverage.
Choosing the right chartplotter is a bit like picking the right pair of shoes for a hike: size and fit matter, but so do terrain and weather. Ask yourself where you boat, what features you want, and how much you plan to expand the system later.
Screen sizes commonly range from compact 5-inch units to large 16-inch multifunction displays. A bigger screen is a blessing for split views (chart + sonar) and for visibility in bright sun. If you often navigate in open water or through crowded channels, consider a screen at least 7 to 9 inches across for comfortable map reading.
Maps are the soul of a chartplotter. Brands support different chart formats — Garmin uses BlueChart, while others rely on C-MAP or Navionics. Some chartplotters include base charts with optional upgrades for detailed coastal navigation, bathymetry, and fishing-specific overlays. Think about whether you need lake charts, coastal charts, or both.
If fishing is part of your plan, sonar capability matters. Many chartplotters can integrate CHIRP sonar, downscan, side-scan, and even mega imaging. Matching the head unit to a compatible transducer is crucial for clear sonar returns. If you want both navigation and fishing features, buy a combo or ensure the unit supports external sonar modules.
Modern marine systems talk to each other. NMEA 2000 networking allows charts, instruments, engines, and autopilots to share data. If you plan to add depth sensors, radar, or an autopilot, pick a chartplotter that supports these networks so components play nicely together.
Budget plays a big role. Mid-range units balance features and price, offering good screens and basic sonar. High-end models deliver large screens, advanced sonar imaging, radar integration, and multi-sensor networking. Consider how often you’ll use advanced features — if you fish weekend tournaments, the investment may pay off.
For under mid-price budgets, you can get reliable chartplotters with built-in GPS, basic mapping, and simple sonar. These units are ideal for casual boaters who need dependable navigation without professional features. Many retailers like Walmart and Amazon carry solid budget options.
High-end chartplotters offer the best screens, fastest processors, and deeper integration with marine systems. Retailers such as West Marine, Defender, and Fisheries Supply commonly stock these premium units and can advise on installation and add-ons like high-power transducers and radar radomes.
Installing a chartplotter can be a weekend DIY if you’re handy, but professional installation ensures clean wiring, proper transducer placement, and correct networking. If you buy from a marine specialist, ask about installation services or vetted local installers.
A transducer mounted in the right spot makes all the difference in sonar clarity. For outboard-powered boats, transducers often mount on the transom or on a bracket. For sterndrive or inboard setups, in-hull or thru-hull options may be better. Always test sonar performance at slow speeds and adjust transducer angle if returns look distorted.
Chartplotters draw modest current, but proper wiring and a clear power supply are essential. Use fused circuits and route cables away from power and bilge pumps that might cause interference. If you’re running a larger display or adding radar, confirm your boat’s battery and charging system can handle the load.
Accessories can turn a good chartplotter into a powerhouse. Think beyond the head unit: upgraded transducers, protective covers, dedicated mounts, and mapping cards can make daily use smoother and more productive.
Good sonar starts with a compatible transducer. Higher-frequency CHIRP transducers provide clearer images for shallow water, while lower-frequency units reach deeper. Many retailers offer bundled packages that match a head unit with a recommended transducer for optimal performance.
Buying a chartplotter without the right network cables is like buying a stereo without speakers. If you plan to integrate instruments, autopilot, or engine data, pick up NMEA 2000 backbone kits and proper drop cables — shipside wiring is not the place to improvise.
Deals pop up seasonally, especially in spring and fall. West Marine and Defender frequently run promotions, Bass Pro Shops may bundle units during major fishing seasons, and Amazon can undercut prices on select models. Keep an eye on holiday sales if you’re shopping for a big upgrade.
To protect your investment, buy from authorized dealers. Warranty coverage often hinges on authorized purchase, and reputable retailers can help with warranty claims and tech support. If a price looks too good to be true from an unknown seller, it might be a gray-market unit with limited backing.
Like any marine gear, chartplotters last longer with a little care. Rinse connections and screens with fresh water after salt exposure, keep vents clear of debris, and update charts and firmware regularly. Think of maintenance as tuning an instrument — a little attention keeps performance sharp.
Manufacturers regularly release firmware updates to improve stability and add features. Chart providers update bathymetry and navigational hazards. Schedule updates when you have a stable internet connection and allow time to verify the update completed successfully before launching.
A simple protective cover prevents UV damage and scratches when the console is not in use. During off-season storage, remove or cover electronics and store mapping cards in a safe place. These small steps extend life and maintain resale value.
Picking a chartplotter is part gear choice, part shopping strategy. If you want expert advice and hands-on help, marine-focused retailers like West Marine, Defender, and Fisheries Supply provide knowledgeable staff and installation options. If you prioritize selection and fast shipping, Amazon and large retailers like Bass Pro Shops are excellent. For budget builds, Walmart and select online dealers offer entry-level units that still get you where you need to go.
Ultimately, the best purchase comes from matching your boating style to a retailer’s strengths: choose specialty shops for complex installs and nationwide stores for convenience and deals. With the right chartplotter and setup, you’ll spend less time worrying about navigation and more time enjoying the open water.
Marine GPS and chartplotters have come a long way, marrying navigation, sonar, and connectivity into compact consoles that make boating safer and more enjoyable. Whether you’re a weekend angler or a liveaboard cruiser, the right unit depends on where you boat, how you fish, and how much you plan to expand your system. Shop smart by comparing retailers like West Marine, Defender, Fisheries Supply, Bass Pro Shops, Amazon, and Walmart, and prioritize authorized dealers to protect warranty coverage. With proper installation and maintenance, your chartplotter will guide countless safe and memorable trips on the water.
| Marine Chartplotters & GPS | Price | |
|---|---|---|
| Si-tex Sas-900 6 Color Class A Ais Transceiver | $ 2.264,23 |
