Bedienungsanleitung Garmin GPSMAP 557 (Seite 41 von 48) (Englisch)

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System Units: Sets the unit format for the device.

Variance: Sets the magnetic declination, the angle between

magnetic north and true north, for your present location.

Heading: Sets the direction references used in calculating

heading information. True sets geographic north as the north

reference. Grid sets grid north as the north reference (000º).

Magnetic sets the magnetic north as the north reference.

Position Format: Sets the position format in which a given

location reading appears. Do not change this setting unless

you are using a map or chart that specifies a different

position format.

Map Datum: Sets the coordinate system on which the map is

structured. Do not change this setting unless you are using a

map or chart that specifies a different map datum.

Pressure Ref. Time: Sets the reference time used to calculate

the barometer trend. The trend is indicated in the barometer

field.

Time Format: Sets a 12-hour, 24-hour, or UTC time format.

Time Zone: Sets the time zone, or allows automatic selection

based on GPS location.

Navigation Settings

NOTE: Some settings and options require additional charts or

hardware.

Select Settings > Navigation.

Route Labels: Sets the type of labels shown with route turns on

the map.

Auto Guidance: Sets the measurements for the Safe Depth,

Safe Height, and Shoreline Distance, when you are using

some premium maps.

Turn Transition Activ.: Sets the turn transition to be calculated

based on time or distance.

Turn Transition Time: Sets how many minutes before the turn

that you transition to it as the next leg, when Time is selected

for the Turn Transition Activ.. You can raise this value to help

improve the accuracy of the autopilot when navigating a route

or an Auto Guidance line with many frequent turns or at

higher speeds. For straighter routes or slower speeds,

lowering this value can improve autopilot accuracy.

Turn Transition Dist.: Sets how far before the turn that you

transition to it as the next leg, when Distance is selected for

the Turn Transition Activ.. You can raise this value to help

improve the accuracy of the autopilot when navigating a route

or an Auto Guidance line with many frequent turns or at

higher speeds. For straighter routes or slower speeds,

lowering this value can improve autopilot accuracy.

Route Start: Selects a starting point for route navigation.

Auto Guidance Line Configurations

CAUTION

The Safe Depth and Safe Height settings influence how the

chartplotter calculates an Auto Guidance line. If an area has an

unknown water depth or an unknown obstacle height, the Auto

Guidance line is not calculated in that area. If an area at the

beginning or the end of an Auto Guidance line is shallower than

the safe water depth or lower than the safe obstacle height, the

Auto Guidance line is not calculated in that area. On the chart,

the course through those areas appears as a gray line. When

your boat enters one of those areas, a warning message

appears.

NOTE: Auto Guidance is available with premium charts, in some

areas.

You can set the parameters the chartplotter uses when

calculating an Auto Guidance line.

Safe Depth: Sets the minimum depth (chart depth datum) the

chartplotter uses when calculating an Auto Guidance line.

NOTE: The minimum safe depth for the premium charts is 3

feet. If you enter a Safe Depth value of less than 3 feet, the

charts only use depths of 3 feet for Auto Guidance route

calculations.

Safe Height: Sets the minimum height (chart height datum) of a

bridge that your boat can safely travel under.

Shoreline Distance: Sets how close to the shore you want the

Auto Guidance line to be placed. The Auto Guidance line

may move if you change this setting while navigating. The

available values for this setting are relative, not absolute. To

ensure that the Auto Guidance line is placed the appropriate

distance from shore, you can assess the placement of the

Auto Guidance line using one or more familiar destinations

that require navigation through a narrow waterway (Adjusting

the Distance from Shore).

Adjusting the Distance from Shore

The Shoreline Distance setting indicates how close to the shore

you want the Auto Guidance line to be placed. The Auto

Guidance line may move if you change this setting while

navigating. The available values for the Shoreline Distance

setting are relative, not absolute. To ensure the Auto Guidance

line is placed the appropriate distance from shore, you can

assess the placement of the Auto Guidance line using one or

more familiar destinations that require navigation through a

narrow waterway.

Dock your vessel or drop the anchor.

Select Settings > Navigation > Auto Guidance > Shoreline

Distance > Normal.

Select a destination that you have navigated to previously.

Select Navigate To > Auto Guidance.

Review the placement of the Auto Guidance line, and

determine whether the line safely avoids known obstacles

and the turns enable efficient travel.

Select an option:

• If the placement of the Auto Guidance line is satisfactory,

select Menu > Stop Navigation, and proceed to step 10.

• If the Auto Guidance line is too close to known obstacles,

select Settings > Navigation > Auto Guidance >

Shoreline Distance > Far.

• If the turns in the Auto Guidance line are too wide, select

Settings > Navigation > Auto Guidance > Shoreline

Distance > Near.

If you selected Near or Far in step 6, review the placement of

the Auto Guidance line, and determine whether the line

safely avoids known obstacles and the turns enable efficient

travel.

Auto Guidance maintains a wide clearance from obstacles in

open water, even if you set the Shoreline Distance setting to

Near or Nearest. As a result, the chartplotter may not

reposition the Auto Guidance line, unless the destination

selected requires navigation through a narrow waterway.

Select an option:

• If the placement of the Auto Guidance line is satisfactory,

select Menu > Stop Navigation, and proceed to step 10.

• If the Auto Guidance line is too close to known obstacles,

select Settings > Navigation > Auto Guidance >

Shoreline Distance > Farthest.

• If the turns in the Auto Guidance line are too wide, select

Settings > Navigation > Auto Guidance > Shoreline

Distance > Nearest.

If you selected Nearest or Farthest in step 8, review the

placement of the Auto Guidance line, and determine

Device Configuration 35

Garmin GPSMAP 557 Seite 41

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