Garmin GPSMap 498 Owner's Manual - Page 87

Sonar Tab Options, General Sub Tab

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Sonar Tab Options When a GSD 22, GSD 21, or GSD 20 is connected to the GPSMAP 392/398/492/498, the Sonar tab appears on the Main Menu. USING SONAR > SONAR TAB OPTIONS General Sub Tab Use the General sub tab to select the keel offset, auto color gain, automatic gain level, automatic scroll speed limit, and transducer type. The available General sub tab options are as follows: Keel Offset-used to offset the surface reading for the depth of a keel. This makes it possible to measure depth from the bottom of your keel instead of from the transducer's location. Enter a positive number to offset for a keel, or enter a negative number to compensate for a large vessel that can draw several feet of water. The Keel Offset reflects in the depth reading. Show Numbers Option To access and change a setting on the Sonar tab: 1. Press and hold ADJ/MENU to access the Main Menu. Use the ROCKER to highlight the Sonar tab. 2. Using the ROCKER, highlight the sub tab and then the field, and press ENTER. 3. Highlight the setting, and press ENTER. 4. Press QUIT to return to the Sonar Page or a previous page. Keel Offset: Transducer at Surface Enter (+) a positive number to show depth from bottom of keel. Keel Offset: Transducer at Bottom of Keel. Enter a (-) negative number to show depth from surface. GPSMAP 392/398/492/498 Owner's Manual 79

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GPSMAP 392/398/492/498 Owner’s Manual
79
U
SING
S
ONAR
>
S
ONAR
T
AB
O
PTIONS
Sonar Tab Options
When a GSD 22, GSD 21, or GSD 20 is connected to the
GPSMAP 392/398/492/498, the Sonar tab appears on the
Main Menu.
Show Numbers Option
To access and change a setting on the Sonar tab:
1.
Press and hold
ADJ/MENU
to access the Main Menu. Use
the
ROCKER
to highlight the
Sonar
tab.
2.
Using the
ROCKER
, highlight the sub tab and then the field,
and press
ENTER
.
3.
Highlight the setting, and press
ENTER
.
4.
Press
QUIT
to return to the Sonar Page or a previous page.
General Sub Tab
Use the
General
sub tab to select the keel offset, auto color gain,
automatic gain level, automatic scroll speed limit, and transducer
type. The available General sub tab options are as follows:
Keel Offset
—used to offset the surface reading for the depth of
a keel. This makes it possible to measure depth from the bottom
of your keel instead of from the transducer’s location. Enter a
positive number to offset for a keel, or enter a negative number to
compensate for a large vessel that can draw several feet of water.
The Keel Offset reflects in the depth reading.
Keel Offset:
Transducer at
Surface Enter (+)
a positive number
to show depth from
bottom of keel.
Keel Offset: Transducer
at Bottom of Keel. Enter
a (-) negative number to
show depth from surface.