Garmin Marine GPS System GPSMAP User Manual

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of 132
 
GPSMAP
®
6000/7000 Series Owner’s Manual 87
Radar
3. Complete an action:
Select Menu > Gain for Cruising, Harbor, Offshore, or Sentry mode.
Congure the setting for the short-range screen in Dual Range mode. Select > Menu >
Gain for the GPSMAP 6000 series. Select Left > Gain for the GPSMAP 7000 series.
Congure the setting for the long-range screen in Dual Range mode. Select > Menu >
Gain for the GPSMAP 6000 series. Select Right > Gain for the GPSMAP 7000 series.
4. Select
Up to raise the gain, until light speckles appear across the Radar screen.
Data on the Radar screen is refreshed every few seconds. As a result, the effects of manually
adjusting the gain may not appear instantly. Adjust the gain slowly.
5. Select
Down to lower the gain until the speckles disappear.
6. If boats, land, or other targets are within range, select
Down to lower the gain until the targets
begin to blink.
7. Select
Up to raise the gain until the boats, land, or other targets appear steadily lit on the Radar
screen.
8. Minimize the appearance of nearby large objects, if necessary (
page 87).
9. Minimize the appearance of side-lobe echoes, if necessary (
page 87).
Minimizing Nearby Large-object Interference
Nearby targets of signicant size, such as jetty walls, can cause a very bright image of the target to
appear on the Radar screen. This image can obscure smaller targets located near it.
NOTE: Depending upon the radar in use, the gain setting congured for use in one radar mode may
or may not be applied to other radar modes or to the Radar Overlay (page 85).
1. From the Home screen, select
Radar.
2. Select
Cruising, Harbor, Offshore, Dual Range or Sentry mode.
3. Complete an action:
Select Menu > Gain for Cruising, Harbor, Offshore, or Sentry mode.
Congure the setting for the short-range screen in Dual Range mode. Select > Menu >
Gain for the GPSMAP 6000 series. Select Left > Gain for the GPSMAP 7000 series.
Congure the setting for the long-range screen in Dual Range mode. Select > Menu >
Gain for the GPSMAP 6000 series. Select Right > Gain for the GPSMAP 7000 series.
4. Select
Down to lower the gain until the smaller targets are clearly visible on the Radar screen.
Reducing the gain to eliminate nearby large-object interference may cause smaller or more-
distant targets to blink or disappear from the Radar screen.
Minimizing Side-lobe Interference on the Radar Screen
Side-lobe interference may appear to streak outward from a target in a semi-circular pattern. Side-
lobe effects can be avoided by reducing the gain or reducing the radar range.
NOTE: Depending upon the radar in use, the gain setting congured for use in one radar mode may
or may not be applied to other radar modes or to the Radar Overlay (page 85).
1. From the Home screen, select
Radar.
2. Select
Cruising, Harbor, Offshore, Dual Range or Sentry mode.
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