GPSMAP 400/500 Series Owner’s Manual 57
Using Sonar
Using Sonar
When connected to a transducer, the following chartplotters can be
used as shnders:
GPSMAP 431s GPSMAP 441s GPSMAP 531s
GPSMAP 536s GPSMAP 541s GPSMAP 546s
Understanding the Full Screen
Select the Full Screen option to view a full-screen graph of the
transducer’s sonar readings.
From the Home screen, select Sonar > Full Screen.
Transducer
frequency or
beam width
Temperature
Speed
Depth
Range
Suspended
targets
Full Screen
Understanding the Flasher Screen
(GPSMAP 431s/531s/536s only) Use the Flasher screen 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 ashes 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.)
From the Home screen, select Sonar > Flasher.
Water depth at
current location
Depth of sonar
readings
Flasher
