34
GPSMAP
®
2008/2108 Owner’s Manual
U
sing
s
onar
capable), cruising, and navigation.
NOTE:
To show water temperature or water
speed, change the setting to
Auto
. If the
connected transducer is capable, the data is
shown.
Advanced Sonar Settings
To adjust advanced sonar settings, press while
viewing a sonar screen.
Range
—the range of the depth scale on the right side
of the screen (
Auto
or
Manual Range)
.
Gain
—controls the sensitivity of the sonar receiver
(
Auto
or
Manual Gain
). To see more detail, increase
the Gain. If the screen is cluttered, decrease the Gain.
beam
—when using a dual beam transducer, select a
Wide
or
Narrow
beam.
Frequency
—when using a dual frequency transducer,
select how the frequencies appear on screen (
200khz
,
50khz
,
Dual,
or
Auto
).
Zoom
—zoom in to a section of the Full Screen.
The zoom is off, or set to
No Zoom
by default. Four
options are available:
•
2x Zoom
—twice the magnification.
•
4x Zoom
—four times the magnification.
•
bottom lock
—locks the zoom window to the
bottom.
•
split Zoom
—opens the Split Zoom screen.
Depth line—
quickly reference a specific depth (
On
or
Off
).
A-scope—
(dual frequency only)
a vertical flasher
along the right side of the screen (
On
or
Off
).
