GPSMAP 4000 Series Owner’s Manual
4
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SInG
S
onar
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Sin
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S
onar
magnified area.
4x Zoom
—four times the magnification. Select
Up
,
Down
, or
Auto
to set the depth range of the
magnified area.
Bottom Lock
—locks the zoom window to the bottom. Select
Up
,
Down
, or
Auto
to set the
depth range of the magnified area.
Depth Line—
quickly reference a specific depth (
On
or
Off
). When
On
is selected, press up or
down on the
ROCKER
to set the depth of the reference line.
A-Scope—
creates a vertical flasher along the right side of the screen (
On
or
Off
).
Sonar Setup
—opens the Sonar Setup screen. See
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