HD bathymetry map that reflects ever-changing conditions

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.

Plotter, mobile & PC!

Get SonarChart on any device! On compatible plotters, it's included with Navionics+, Navionics Updates (for Gold and HotMaps Premium), Platinum+ and HotMaps Platinum. On mobile, find it in any Boating app on Apple and Android. Check it out on our Chart Viewer!

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 and enhance SonarChart where you go boating. Depending on your hardware, you can participate using any of the options listed below.

Enhance with SonarChart Live!

SonarChart Live is a feature available on plotters and mobile. It allows to create 1ft/0.5 m personal HD bathymetry maps while navigating with the results displaying on your device in real time! You can automatically share depth data with Navionics to improve SonarChart.

Enhance with mobile

Use the Navionics 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.

Enhance with Raymarine

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 to using a computer.

Enhance with Lowrance, Simrad and B&G

SonarChart Live on the Navionics 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.

Enhance with 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.

See the results

Mobile: in the Boating App, go to Menu > Update All (or Download Map).
Plotter: Plug your card in your computer, then go here to download the new SonarChart as an update. Or, use Plotter Sync with compatible models!
PC: See the latest charts on our Chart Viewer.
New sonar log data normally takes about a week to be integrated, but may sometimes take longer based on data process variables. Check the processing status of your sonar logs. 

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™ Event! We'll help you get started!


SonarChart is available for all Navionics coverage areas, except West Africa. We accept sonar logs and integrate the data wherever SonarChart exists and also welcome data from other areas for possible future use. Sweden, Norway and Finland restrict sonar logs recording at sea.