Garmin GPSMAP 700 - Page 73

GPSMAP
®
700 Series Owner’s Manual 69
Radar
Settings Congurations and Radar Type
When using a GMR 20, 21, 40, 41, 18, 18 HD, 24, 24 HD, 404, or 406, all gain and clutter settings
congured for use in one radar mode are applied to every other radar mode.
When using a GMR 604 xHD, 606 xHD, 1204 xHD, or 1206 xHD radar, the gain, FTC, rain clutter,
and sea clutter settings congured for use in one radar mode must be congured separately for each
mode. Crosstalk settings congured for use in one mode are applied to every other radar mode.
Default Gain and Clutter Settings
Setting Default Value Instructions
Gain Auto See “Automatically Adjusting Gain on the Radar Screen” (page 69).
Sea Clutter Calm, Medium, or Rough See “Restoring the Default Sea Clutter Setting” (page 70).
Rain Clutter Off See “Restoring the Default Rain Clutter Setting” (page 71).
FTC Off See “Restoring the Default FTC Setting” (page 71)
Crosstalk On See Adjusting Crosstalk Clutter on the Radar Screen” (page 72).
Automatically Adjusting Gain on the Radar Screen
Auto is the default value for the gain setting. 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 congured for use in one radar mode may
or may not be applied to other radar modes (page 69).
1. From the Home screen, select
Radar.
2. Select
Cruising, Harbor, Offshore, or Sentry mode.
3. Select
Menu > Gain > Auto.
The chartplotter sets the gain automatically once, based on average conditions, the range of the radar
signal, and the selected radar mode. The chartplotter does not readjust the gain automatically in
response to changing conditions.
Manually Adjusting Gain on the Radar Screen
For optimal radar performance that accounts for actual conditions, you can manually adjust the gain.
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 (page 69).
1. From the Home screen, select
Radar.
2. Select
Cruising, Harbor, Offshore, or Sentry mode.
3. Select
Menu > Gain.
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 70).
9. Minimize the appearance of side-lobe echoes, if necessary (
page 70).