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44 GPSMAP 4000 Series Owner’s Manual
uSInG radar
usInG
radar
Understanding the Cruising Screen
Use the Cruising screen to view a full-screen image of the gathered radar information. Your position
is in the center of the screen, and the rings provide distance measurements.
Radar - Cruising Screen
Range rings
Heading line
Zoom scale
The zoom scale represents the distance from your position (the center) to the outermost ring. Each
ring represents an even division of the zoom scale. For example, if the zoom scale is set at three
kilometers or miles, each ring represents one kilometer or mile from the center out. Adjust the zoom
scale by using the RANGE (+/-) keys.
Cruising screen settings
To access additional settings or options for the radar cruising screen, press MENU.
Gain—
controls the sensitivity of the radar receiver. The default setting, Auto, adjusts automatically
to provide optimal performance. You can also set the gain manually. When you select Gain, select
Up or Down (or use the RANGE or ROCKER keys) to manually adjust the gain. Select Auto to
return the gain to the default setting.
Select Rain Cltr to adjust the gain for unwanted clutter caused by rain at close ranges. Select
Up or Down (or use the RANGE or ROCKER keys) to adjust the rain clutter sensitivity.
Select Sea Cltr to adjust the gain for clutter caused by choppy sea conditions. Select Nxt
Prset to cycle between Rough, Med, Calm, or Off. You can also select Up or Down (or use
the RANGE or ROCKER keys) to manually adjust the sea clutter sensitivity.
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