GPSMAP
®
6000/7000 Series Owner’s Manual
7
Radar
3. Complete an action:
Select
Menu
>
Gain
for Cruising, Harbor, Offshore, or Sentry mode.
Configure 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.
Configure 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 (
9. Minimize the appearance of side-lobe echoes, if necessary (
).
Minimizing Nearby Large-object Interference
Nearby targets of significant 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 configured for use in one radar mode may
or may not be applied to other radar modes or to the Radar Overlay (
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.
Configure 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.
Configure 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 configured for use in one radar mode may
or may not be applied to other radar modes or to the Radar Overlay (
1. From the Home screen, select
Radar
.
2. Select
Cruising
,
Harbor
,
offshore
,
Dual Range
or
Sentry
mode.
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