Garmin GPSMAP 557xs Kullanıcı El Kitabı - Sayfa 19

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Viewing Tide Station, Current Station, or Celestial

Information for a Different Date

Select Nav Info > Tides & Currents.

Select Tides, Currents, or Celestial.

Select an option.

• To view information for a different date, select Change

Date > Manual, and enter a date.

• To view information for today, select Change Date >

Current.

• If available, to view information for the day after the date

shown, select Next Day.

• If available, to view information for the day before the date

shown, select Previous Day.

Viewing Information for a Different Tide or Current

Station

Select Nav Info > Tides & Currents.

Select Tides or Currents.

Select Nearby Stations.

Select a station.

Viewing Almanac Information from the Navigation

Chart

Select Charts > Navigation Chart.

Select an area on the map.

Select Information.

Select Tides, Currents, or Celestial.

When properly connected to an optional Garmin sounder

module and a transducer, your compatible chartplotter can be

used as a fishfinder. There are three different sonar views to

help you view the fish in the area: a full-screen view, a split-

zoom view, and a split frequency view.

Full-Screen Sonar View

The full-screen sonar view shows a large image of the sonar

readings from a transducer. The range scale along the right side

of the screen shows the depth of detected objects as the screen

scrolls from the right to the left.

Select Sonar > Full Screen.

Range adjustment controls

Position information

Suspended targets or fish

Bottom of the body of water

Range or depth of the water

Transducer frequency

Split-Zoom Sonar View

The split-zoom sonar view shows a full-view graph of sonar

readings, and a magnified portion of that graph, on the same

screen.

Select Sonar > Split Zoom.

Sonar

Split-Frequency Sonar View

In the split-frequency sonar view, one side of the screen shows

a full-view graph of high frequency sonar data, and the other

side of the screen shows a full-view graph of lower frequency

sonar data.

NOTE: The split-frequency sonar view requires the use of a

dual-frequency transducer.

Select Sonar > Split Frequency.

Pausing the Sonar Display

From a Sonar view, select Menu > Pause Sonar.

Creating a Waypoint on the Sonar Screen

From a Sonar view, select Menu > Pause Sonar.

Select the location of the waypoint.

Select Mark or New Waypoint.

Adjusting the Gain on the Sonar Screen

You can control the sensitivity of the sonar receiver. To see

more detail, increase the gain. If the screen is cluttered,

decrease the gain.

From a Sonar view, select Menu > Gain.

Select an option:

• To increase or decrease the gain manually, select Up or

Down.

• To allow the chartplotter to adjust the gain automatically,

select an automatic option.

Adjusting the Range of the Depth Scale

You can adjust the range of the depth scale that appears on the

right side of the screen.

From a Sonar view, select Menu > Range.

Select an option:

• To allow the chartplotter to adjust the depth scale

automatically, select Auto.

• To increase or decrease the range of the depth scale

manually, select Up or Down.

TIP: From the sonar screen, you can select

manually adjust the range of the depth scale.

Setting the Zoom Level on the Sonar Screen

From a Sonar view, select Menu > Zoom.

Select an option:

• To zoom in on the sonar data from the bottom depth,

select Bottom Lock.

• To set the depth range of the magnified area manually,

select Set Zoom, select View Up or View Down to set

the depth range of the magnified area, and select Zoom

In or Zoom Out to increase or decrease the magnification

of the magnified area.

• To set the depth and zoom automatically, select Set

Zoom > Auto.

Selecting Frequencies

You can indicate which frequencies appear on the sonar screen

when using a dual frequency transducer.

From a Sonar view, select Menu > Frequency.

Select an option:

• To sweep each pulse through a range of frequencies to

deliver shallow-water-like target separation at extremely

deep depths and at low frequencies, select Chirp. This is

useful mainly for very deep, offshore waters and when

targeting some species of fish.