Operation Manual
GPSMAP 400/500 Series Owner’s Manual 47
Using Sonar
Understanding the Temp Log Screen
If you are using a temperature-capable transducer, the Temp Log
screen keeps a graphic log of temperature readings over time. The
current temperature and the depth are shown in the top-left corner.
From the Home screen, select Sonar > Temp Log.
Press MENU to set the duration and the scale for the log.
Temperature
range
Time
elapsed
Temp
and
depth
Temp Log
The temperature appears along the right side, and the time
elapsed appears along the bottom. The graph scrolls to the left as
information is received.
Setting Up Sonar
Use the Sonar Setup screen to dene and adjust settings universal to
all sonar screens.
From the Home screen, select Sonar > Sonar Setup.
Scroll Speed—adjust the rate at which the sonar scrolls from
right to left (Ultrascroll
™
, Fast, Medium, or Slow). If using a
speed-capable transducer, select Auto to have the scroll speed
automatically adjust to the water speed of your boat.
Surface Noise—show or hide the sonar returns near the surface of
the water. Hide surface noise to help reduce clutter.
Depth Line
—quickly reference a specic depth (Show or Hide). To
set the depth of the reference line, select Show, and then press up or
down on the Rocker.
A-Scope
—display a vertical asher along the right side of the
screen.