HD bathymetry map

HD bathymetry map


High Def 1 ft/0.5 m detail

SonarChart is an HD bathymetry map featuring extraordinary bottom contour detail for marine and lakes, great for increasing awareness of shallow waters and for locating fishing areas at any depth level. See video.

Want better charts? Go boating!

SonarChart is constantly enhanced by millions of sonar logs contributed from boaters like you. Navionics accepts sonar logs recorded with the vast majority of sonar/plotter brands and mobile devices. These are integrated with existing data, updating SonarChart to reflect the ever-changing conditions of sea, lake and river bottoms. See the video, and learn more from this article and SonarChart stories!

Jump on board!

Contribute sonar logs to enhance SonarChart. Use any of the options below:


Use the Boating app to do SonarChart Live. Just connect the device to your sonar/plotter:
- directly, if it has built-in Wi-Fi,
- or through a Wi-Fi router.
Sonar logs are automatically shared.


With a built-in Wi-Fi plotter, you can:
- create SonarChart Live right on the screen
- record sonar logs on the plotter, then upload via Plotter Sync or here.
Logs recorded with older units (since 2003) that do not have Wi-Fi can be exported to a card (if required) and uploaded using a computer.

Lowrance, Simrad and B&G

SonarChart Live on the Boating app is the best way to automatically contribute sonar data from Lowrance, Simrad and B&G plotters. Models with built-in Wi-Fi, for example HDS Gen3 or Elite Ti, can connect directly to the mobile device. Other models that do not have Wi-Fi may connect to the Boating app using a compatible Wi-Fi router, such as the Navico branded GoFree WIFI-1 Module.

Humminbird and other plotters

Record your sonar logs to a blank memory card or on a Navionics card if space is available (one hour of recording corresponds to about 1GB). Then, upload them here through a computer. Alternatively, use SonarChart Live.

With SonarChart Live!

Processing of data

New sonar log data normally takes about a week to be integrated, but may sometimes take longer based on data process variables. 

Daily Updates

We integrate sonar log contributions using advanced integration processes, to update SonarChart every day along with Nautical Chart and Community Edits. A one-year subscription to Daily Updates and advanced features is included when you purchase any new product.

SonarChart on every device


Tap the Navionics icon on the lower left hand side of the Boating app to switch from Nautical Chart to SonarChart.

Plotter GPS


See our charts for free on the Chart Viewer.


SonarChart is available for all Navionics coverage areas.
Sweden, Norway and Finland restrict sonar logs recording at sea.

Host an event!

Are you the director of a fishing tournament or regatta? Include sonar log collection with your next scheduled activity or host a dedicated SonarChart Even! We'll help you get started!

Discover our other chart layers

Nautical Chart

An accurate and thorough set of information created for marine and lakes. All essential cartographic reference detail for cruising, sailing and fishing.

Community Edits

All kinds of valuable local information shared by millions of app users from every part of the world.