You can record freely as you go about your day! For best sonar log recording, we suggest you keep your speed under 6 knots, although maximum logging speed may vary depending on which device you are using; perform a grid pattern where the distance between tracks is no more than 50 meters /150 feet; and save about every 30 minutes to reduce any risk of loss.
Make sure your CF card is inserted into your GPS chartplotter and press MENU.
Tap System Diagnostics
Tap External Interfaces
Tap NMEA Port 1
Tap Record -> ON soft key.
This will then move the highlight to “Off” indicating it is now saving an active log to your CF card