Radar

When using a GMR 604 xHD, 606 xHD, 1204 xHD, or 1206 xHD radar, the last gain and clutter settings configured for use in any radar mode are applied to the Radar Overlay automatically. For example, if the gain for the Harbor mode is set to 50%, the gain for the Radar Overlay is set to 50% automatically. Later, if the gain for the Offshore mode is set to 40%, the gain for the Radar Overlay is set to 40% automatically.

Default Gain and Clutter Settings

Setting

Default Value

Instructions

Gain

Auto

See “Automatically Adjusting Gain on the Radar Screen”

 

 

(page 86).

Sea Clutter

Calm, Medium, or Rough

See “Restoring the Default Sea Clutter Setting” (page 88).

Rain Clutter

Off

See “Restoring the Default Rain Clutter Setting” (page 89).

FTC

Off

See “Restoring the Default FTC Setting” (page 89).

Crosstalk

On

See Adjusting Crosstalk Clutter on the Radar Screen” (page 91).

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 configured 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 > Auto for Cruising, Harbor, Offshore, or Sentry mode.

•Configure the setting for the short-range screen in Dual Range mode. Select > Menu > Gain > Auto for the GPSMAP 6000 series. Select Left > Gain > Auto for the GPSMAP 7000 series.

•Configure the setting for the long-range screen in Dual Range mode. Select > Menu > Gain > Auto for the GPSMAP 6000 series. Select Right > Gain > Auto for the GPSMAP 7000 series.

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 configured 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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GPSMAP® 6000/7000 Series Owner’s Manual