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.

Range rings

Zoom scale

Heading line

Distance between rings

Using Radar

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, each ring represents one kilometer from the center out. Use the RANGE (+/-) keys (GPSMAP 4000 series) or the and keys (GPSMAP 5000 series) to adjust the zoom scale.

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. Select Up or Down to manually adjust the gain; select Auto to return the gain to the default setting.

•Rain Cltr—adjust the gain for unwanted clutter caused by rain at close ranges. Select Up or Down to adjust the rain clutter sensitivity.

•Sea Cltr—adjust the gain for clutter caused by choppy sea conditions. Select Nxt Prset to cycle between Rough, Med, Calm, or Off. Select Up or Down to manually adjust the sea clutter sensitivity.

Guard Zone—defines a safe zone around your boat. An alarm sounds when a detected object enters this zone. Select On or Off. If the guard zone is on, you can define the boundaries by selecting Adjust Guard Zone.

•Corner 1 (and Corner 2): Use the ROCKER (GPSMAP 4000 series) as indicated by the arrows

( and ) to define the size of the guard zone. Select Corner 1 or Corner 2 to change the reference point. For GPSMAP 5000 series units, touch Corner 1, and then touch the point on the screen where you want the first corner of the guard zone. Repeat this with Corner 2.

•Circular: Joins the guard zone to completely encompass the boat. Use Corner 1 or Corner 2 to

adjust the size.

Corner 1

Corner 2

Circular

Nav Features—hides or shows distance, arrival time, and bearing when navigating to a destination.

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GPSMAP® 4000/5000 Series Owner’s Manual