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10 Best Garmin Chartplotter
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Buying Guide for the Best Garmin Chartplotter
Choosing the right chartplotter is important for both safety and enjoyment when spending time on the water. Chartplotters act as navigation aids, offering detailed maps, GPS tracking, and extra features like sonar and connectivity to other marine devices. Think carefully about the type of boating you do, whether it's fishing, sailing, or cruising, and consider how and where you use your boat. Understanding your needs will help you find the chartplotter that offers the best mix of features and user-friendliness for your adventures.Display SizeDisplay size refers to the physical screen dimensions of the chartplotter and is measured diagonally in inches. A larger screen makes it easier to view maps and data, especially when you split the screen to show different information at once. Smaller screens, usually under 7 inches, are compact and fit well in tight spaces, but may be harder to read in rough conditions or from a distance. Medium displays, around 7-9 inches, offer a good balance for many boaters, while large screens (10 inches and above) are best for larger boats or those who want detailed split views. Consider your boat’s helm space and how much data you want to monitor at once to decide which size fits your situation.
Mapping and Chart OptionsChartplotters come preloaded with different types of maps, ranging from basic coastal outlines to highly detailed fishing and lake charts. Some support upgrades to premium maps. More detailed charts help with navigation around shallow waters, marinas, or unfamiliar coastlines. Decide what type of water you’ll be boating in—like inland lakes, coastal areas, or offshore—and make sure the chartplotter supports detailed, updated maps for those areas. If you plan to fish, specialized fishing charts with contour lines and bottom details are helpful. Some units allow you to add or update maps, which is useful if your boating locations change.
Sonar TechnologyMany chartplotters include sonar to help you see underwater structures, locate fish, and avoid hazards. The types of sonar vary: basic 2D sonar gives you a general view, down and side imaging provide detailed pictures below or beside your boat, and CHIRP sonar improves clarity and depth. If fishing is a priority, look for models with advanced sonar features. If navigation is your main use, a simpler sonar might be enough. Make sure your unit works with the types of sonar transducers available for your boat.
Touchscreen vs. Button ControlsChartplotters are operated either through touchscreens, buttons, or a combination. Touchscreens are intuitive and quick for zooming and managing settings, much like a smartphone, but can be tricky to use with wet hands or gloves. Button controls are often easier in rough weather or when hands are wet, and some boaters prefer their tactile feedback. Some units offer both. Choose based on your typical boating conditions and personal comfort with technology.
Connectivity and NetworkingConnectivity describes how the chartplotter can link with other devices—such as your smartphone, radar, autopilot, or engine data. Basic models may only stand alone, while more advanced units can connect over Wi-Fi, Bluetooth, or dedicated marine networks. If you want to integrate multiple systems (like sharing maps across devices or adding accessories), make sure the chartplotter supports that. For updating charts or using mobile apps, wireless connectivity can be a great convenience.
Mounting Options and DurabilityChartplotters are designed to be mounted either flush (built into the dashboard) or on brackets (standing on top of the helm). The right choice depends on your boat’s setup and available space. Durability is also important—look for units that are waterproof and can handle sun, spray, and rough conditions. Consider what works best for your boat layout and how exposed your electronics will be to the elements.