Understanding The Split Frequency Screen; Understanding The Temp Log - Garmin GPSMAP 4008 Owner's Manual

Using Sonar

Understanding the Split Frequency Screen

Use the Split Frequency screen (dual-frequency transducer only) to view both the 50 kHz and 200
kHz frequencies on the same screen. A 200 kHz frequency graph appears on the left; a 50 kHz
frequency graph appears on the right.
From the Home screen, select
Depth, temperature,
and water speed
GPS speed and
GPS heading
Transducer
frequencies

Understanding the Temp Log

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 depth are shown in the upper-left
corner.
From the Home screen, select
Temperature
and depth
Time
elapsed
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.
40
Sonar > Split Frequency.
Sonar Temp Log.
>
GPSMAP 4000/5000 Series Owner's Manual
®
Range
Temperature
Range