Clearing the Echo Trails
You can remove the echo trails from the radar screen to
reduce the clutter on the screen.
From a radar screen, select
Options
>
Radar Options
>
Echo Trails
>
Clear Trails
.
Radar Settings
NOTE:
Not all options and settings are available on all
radar and chartplotter models.
NOTE:
You can optimize the radar display for each radar
mode.
Radar Gain
Adjusting Gain on the Radar Screen Automatically
The automatic gain setting for each radar mode is
optimized for that mode, and may differ from the automatic
gain setting used for another mode.
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.
NOTE:
Not all options are available on all radar models.
1
From a radar screen or the radar overlay, select
Options
>
Gain
.
2
Select an option:
• To adjust the gain automatically for changing
conditions, select
Auto Low
or
Auto High
.
• To adjust the gain automatically to show birds over
the surface of the water, select
Auto Bird
.
NOTE:
This option is not available on xHD open
array or HD/HD+ radome models.
Adjusting Gain on the Radar Screen Manually
For optimal radar performance, you can manually adjust
the gain.
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 a Radar screen or the Radar overlay, select
Options
>
Gain
.
2
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.
3
Select
Down
to lower the gain until the speckles
disappear.
4
If boats, land, or other targets are within range, select
Down
to lower the gain until the targets begin to blink.
5
Select
Up
to raise the gain until the boats, land, or
other targets appear steadily lit on the Radar screen.
6
Minimize the appearance of nearby large objects, if
necessary.
7
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 a Radar screen or the Radar overlay, select
Options
>
Gain
.
2
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 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 a Radar screen or the Radar overlay, select
Options
>
Gain
.
2
Select
Down
to lower the gain until the semi-circular,
streaked pattern disappears from the Radar screen.
Reducing the gain to eliminate side-lobe interference
may cause smaller or distant targets to blink or
disappear from the Radar screen.
Radar Filter Settings
Adjusting Sea Clutter on the Radar Screen
You can adjust the appearance of clutter caused by
choppy sea conditions. The sea clutter setting affects
the appearance of nearby clutter and targets more than
it affects the appearance of distant clutter and targets.
A higher sea clutter setting reduces the appearance of
clutter caused by nearby waves, but it can also reduce or
eliminate the appearance of nearby targets.
NOTE:
Depending upon the radar in use, the sea clutter
setting configured for use in one radar mode may or
may not be applied to other radar modes or to the radar
overlay.
NOTE:
Not all options and settings are available on all
radar and chartplotter models.
1
From a radar screen or the radar overlay, select
Options
>
Radar Filters
>
Sea Clutter
.
2
Select an option:.
• Select an
Auto
option based on the sea conditions.
• Select
Up
or
Down
to adjust the appearance of
sea clutter until other targets are clearly visible on
the radar screen. Select a setting that reflects the
present sea conditions.
Clutter caused by sea conditions may still be visible.
54
Radar
