Bedienungsanleitung Garmin GPSMAP 8500 (Seite 35 von 62) (Englisch)

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Echo Trails

The echo trails feature enables you to track the movement of

vessels on the radar display. You can change the length of time

the trail is displayed.

NOTE:

Depending upon the radar in use, the settings configured

for use in one radar mode may or may not be applied to other

radar modes or to the radar overlay.

NOTE: Not all options and settings are available on all radar and

chartplotter models.

Turning on Echo Trails

From a radar screen, select Menu

> Radar Options > Echo

Trails > Display

Adjusting the Length of the Echo Trails

From a radar screen or the radar overlay, select Menu >

Radar Options > Echo Trails

> Time

Select the length of the trail.

Clearing the Echo Trails

You can remove the echo trails from the radar screen to reduce

the clutter on the screen.

From a radar screen, select Menu > Radar Options >

Echo

Trails > Clear Trails

Optimizing the Radar Display

You can adjust the radar display settings for reduced clutter and

increased accuracy.

NOTE:

You can optimize the radar display for each radar mode.

Select a radar range (Adjusting the Radar Range, page 25).

Restore the default value of the gain setting (Adjusting Gain

on the Radar Screen Automatically,

page

27).

Adjust the gain setting manually (Adjusting Gain on the

Radar Screen Manually,

page

27).

Radar Gain and Clutter

Adjusting Gain on the Radar Screen Automatically

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.

NOTE: Not all options and settings are available on all radar and

chartplotter models.

From a radar screen or the radar overlay, select Menu

Gain

Select an option:

• To adjust the gain automatically for changing conditions,

select

Auto Low or Auto High.

• To adjust the gain automatically to show birds over the

surface of the water, select Auto Bird

Adjusting Gain on the Radar Screen Manually

For optimal radar performance, 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.

From a Radar screen or the Radar overlay, select Menu >

Gain.

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.

Select

Down to lower the gain until the speckles disappear.

If boats, land, or other targets are within range, select Down

to lower the gain until the targets begin to blink.

Select

Up to raise the gain until the boats, land, or other

targets appear steadily lit on the Radar screen.

Minimize the appearance of nearby large objects, if

necessary.

Minimize the appearance of side-lobe echoes, if necessary.

Minimizing Nearby Large-Object Interference

Nearby targets of significant size, such as jetty walls, can cause

a very bright image of the target to appear on the Radar screen.

This image can obscure smaller targets located near it.

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.

From a Radar screen or the Radar overlay, select Menu >

Gain.

Select

Down to lower the gain until the smaller targets are

clearly visible on the Radar screen.

Reducing the gain to eliminate nearby large-object

interference may cause smaller or distant targets to blink or

disappear from the Radar screen.

Minimizing Side-Lobe Interference on the Radar Screen

Side-lobe interference may appear to streak outward from a

target in a semi-circular pattern. Side-lobe effects can be

avoided by reducing the gain or reducing the radar range.

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.

From a Radar screen or the Radar overlay, select Menu >

Gain.

Select

Down to lower the gain until the semi-circular,

streaked pattern disappears from the Radar screen.

Reducing the gain to eliminate side-lobe interference may

cause smaller or distant targets to blink or disappear from the

Radar screen.

Adjusting Sea Clutter on the Radar Screen Automatically

You can set the chartplotter to automatically adjust the

appearance of clutter caused by choppy sea conditions.

NOTE: Depending upon the radar in use, the sea clutter setting

configured for use in one radar mode may or may not be applied

to other radar modes or to the radar overlay.

NOTE: Not all options and settings are available on all radar and

chartplotter models.

From a radar screen or the radar overlay, select Menu > Sea

Clutter.

Select

Presets or Auto.

Select a setting that reflects the present sea conditions.

When using a compatible radar model, the chartplotter adjusts

the sea clutter based on the sea conditions automatically.

Adjusting Sea Clutter on the Radar Screen Manually

You can adjust the appearance of clutter caused by choppy sea

conditions. The sea clutter setting affects the appearance of

nearby clutter and targets more than it affects the appearance of

distant clutter and targets. A higher sea clutter setting reduces

the appearance of clutter caused by nearby waves, but it can

also reduce or eliminate the appearance of nearby targets.

NOTE:

Depending upon the radar in use, the sea clutter setting

configured for use in one radar mode may or may not be applied

to other radar modes or to the radar overlay.

From a radar screen or the radar overlay, select Menu >

Sea

Clutter

Radar 27

Garmin GPSMAP 8500 Seite 35

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