Understanding the Flasher Screen
From the Home screen, select Flasher to display sonar information on a circular depth scale. The scale indicates what is beneath your boat. It is organized as a ring that starts at the top and progresses clockwise. Sonar information flashes on the ring when it is received at the depth indicated. The colors indicate different strengths of the sonar return. (When using the white default color scheme, red indicates the strongest return, blue indicates the weakest return, and white indicates no return.)
Battery voltage 
Depth of sonar readings 
Water depth at current location
Press MENU to change the range, gain, beam, and sonar settings, as described starting on page 5.
Fishfinder 300C Quick Start Manual |