Garmin 521 User Manual
GPSMAP 400/500 Series Owner’s Manual
45
Using Sonar
Depth, temperature, and speed
Range
Frequencies
Split Frequency
Understanding The Split Zoom Screen
Use the Split Zoom screen to view the full sonar data from the graph
and a zoomed in portion on the same screen.
From the Home screen, select
Sonar
>
Split Zoom
.
Transducer frequency
or beam width
Depth, temperature,
and speed
Range
Zoom
window
Zoomed
depth scale
Zoom level
Split Zoom
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
.