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Understanding the cruising screen – Garmin GPSMAP 4000 User Manual

Page 44

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GPSMAP 4000 Series Owner’s Manual

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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

Heading line

Zoom scale

Distance

between rings

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 miles, each ring represents one 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. 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

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.

Circular

: Joins the guard zone to completely encompass the boat. Use

Corner 1

or

Corner 2

to

adjust the size.

Corner

Corner 2

Circular

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