Garmin Fishfinder vs Chartplotter – what are the differences?

Fishfinders and chartplotters are widely used in marine navigation and fishing, incorporating sonar and mapping technology to enhance the on-water experience. While both devices serve important functions, their capabilities differ.

Fishfinders primarily use sonar technology to detect fish and underwater structures, displaying scans to assist anglers in identifying locations with higher activity. Some models, such as those in the Garmin STRIKER series, include built-in GPS and waypoint marking features, allowing users to navigate back to preferred fishing spots. These devices are designed for ease of use, particularly in smaller bodies of water, and can manually create and store maps through features like Quickdraw Contours and the ActiveCaptain app.

Source Garmin.com

Chartplotters provide additional functionality beyond fish detection. Garmin ECHOMAP and GPSMAP chartplotters support a range of marine equipment, including advanced sonar, radar, autopilots, and digital switching. Many models come with built-in Garmin Navionics+ mapping, which offers a subscription to daily chart updates and various navigational features. These chartplotters display sonar data alongside more advanced mapping capabilities, catering to anglers and boaters requiring comprehensive navigation tools.

Specific chartplotter models feature large touchscreen displays, wireless networking, and the ability to integrate multiple marine technologies, including trolling motors, cameras, stereos, and VHF radios. Most chartplotters support LiveScope live-scanning sonar technology, whereas fishfinders are designed for more straightforward sonar applications.

One key difference between the two is mapping capability. While many chartplotters include built-in mapping or support external charts, fishfinders generally lack detailed mapping features. Additionally, chartplotters offer compatibility with a broader range of marine accessories, such as LiveScope sonar, autopilots, and radar. Screen size is another distinguishing factor, with chartplotters ranging from 6 to 27 inches, while fishfinders typically have a maximum screen size of 9 inches. Some chartplotters also provide high-resolution displays, offering improved clarity.

Choosing between a fishfinder and a chartplotter depends on individual needs, vessel type, and intended use.