Using Sonar; Understanding The Full Screen; Understanding The Split Zoom Screen - Garmin GPSMAP 4008 Owner's Manual

When connected to an optional Garmin GSD 22 sounder module and a transducer, your chartplotter
becomes a powerful fishfinder. The GSD 22 connects through the Garmin Marine Network and
shares sonar data with every chartplotter connected to the network.

Understanding the Full Screen

Full Screen
Select the option to view a full-screen graph of the transducer's sonar readings. The
range scale along the right side of the screen shows the depth of detected objects as the screen scrolls
from the right to the left.
From the Home screen, select
Depth, temp, and
water speed
Suspended
target
Bottom
GPS speed and
GPS heading
Transducer
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
Depth, temperature,
and water speed
Zoomed depth
scale
GPS speed and
GPS heading
Zoom level
Transducer frequency
GPSMAP 4000/5000 Series Owner's Manual
®
u s
sInG onar
Sonar > Full Screen.
Sonar Split Zoom.
>
u S
SInG onar
Range
Zoom
Range
window
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