Bedienungsanleitung Garmin GPSMAP 557 (Seite 26 von 48) (Englisch)

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Wider beam widths generate larger arches for fish target

returns, making them ideal for locating fish. Wider beam

widths also perform better in deep water, because the lower

frequency has better deep water penetration. Wider beam

widths can also generate more surface noise and reduce

bottom signal continuity during rough sea conditions.

Use AHRS: Allows the internal attitude heading and reference

system (AHRS) sensors to detect the installation angle of the

Panoptix transducer. When this setting is turned off, it is

assumed the transducer is installed at a 45-degree angle.

Sonar Recordings

Recording the Sonar Display

NOTE: Not all models support sonar recording.

Insert a memory card into the card slot.

From a sonar view, select Menu > Sonar Setup > Sonar

Recording > Record Sonar.

15 minutes of sonar recording uses approximately 200 MB of

space of the inserted memory card. You can record sonar

until the card reaches capacity.

Stopping the Sonar Recording

Before you can stop recording sonar, you must begin recording

it (Recording the Sonar Display).

From a sonar view, select Menu > Sonar Setup > Sonar

Recording > Stop Recording.

Deleting a Sonar Recording

Insert a memory card into the card slot.

From a sonar view, select Menu > Sonar Setup > Sonar

Recordings > View Recordings.

Select a recording.

Select Delete.

Playing Sonar Recordings

Before you can play back the sonar recordings, you must

download and install the HomePort

™

application and record

sonar data onto a memory card.

Remove the memory card from the device.

Insert the memory card into a card reader attached to a

computer.

Open the HomePort application.

Select a sonar recording from your device list.

Right-click the sonar recording in the lower pane.

Select Playback.

Depth and Water Temperature Graphs

If you are using a depth-capable transducer, or are receiving

water depth information over NMEA

0183 or NMEA 2000, you

can view a graphic log of depth readings over time. If you are

using a temperature-capable transducer, or are receiving water

temperature information over NMEA 0183 or NMEA 2000, you

can view a graphic log of temperature readings over time.

The graphs scroll to the left as information is received.

Select Sonar > Data Graphs.

Setting the Depth and Water Temperature Graph

Range and Time Scales

You can indicate the amount of time and the range of depth that

appear in the depth and water temperature graphs.

Select Sonar > Data Graphs > Menu.

Select Depth Graph Settings or Temperature Graph

Settings.

Select an option:

• To set a time-elapsed scale, select Duration. The default

setting is 10 minutes. Increasing the time-elapsed scale

allows you to view variations over a longer period of time.

Decreasing the time-elapsed scale allows you to view

more detail over a shorter period of time.

• To set the depth-range or temperature-range scale, select

Scale. Increasing the scale allows you to view more

variation in readings. Decreasing the scale allows you to

view more detail in the variation.

Radar

WARNING

The marine radar transmits microwave energy that has the

potential to be harmful to humans and animals. Before

beginning radar transmission, verify that the area around the

radar is clear. The radar transmits a beam approximately 12°

above and below a line extending horizontally from the center of

the radar.

When the radar is transmitting, do not look directly at the

antenna at close range; eyes are the most sensitive part of the

body to electromagnetic energy.

NOTE: Not all models support radar.

When you connect your compatible chartplotter to an optional

Garmin marine radar, such as a GMR

™

1226 xHD2 or a GMR 24

HD, you can view more information about your surroundings.

The GMR transmits a narrow beam of microwave energy as it

rotates to a 360° pattern. When the transmitted energy contacts

a target, some of that energy is reflected back to the radar.

Radar Display Modes

NOTE: Not all modes are available with all radar devices and all

chartplotters.

Select Radar.

Cruising Mode: Shows a full-screen image of the gathered

radar information.

Harbor Mode: Intended for use in inland waters, this mode

works best with short-range signals (2 nm or less).

Offshore Mode: Intended for use in open waters, this mode

works best with long-range signals.

Sentry Mode: Allows you to put the radar into timed-transmit

mode, in which you can configure a radar transmit and

standby cycle to conserve power. You can also enable a

guard zone in this mode, which identifies a safe zone around

your boat. If you switch from Sentry mode to another mode,

the radar switches to full-time transmission and disables all

guard zones.

Radar Overlay Mode: Shows a full-screen image of the

gathered radar information on top of the Navigation chart.

The Radar overlay displays data based on the most recently

used radar mode.

Transmitting Radar Signals

NOTE: As a safety feature, the radar enters standby mode after

it warms up. This gives you an opportunity to verify the area

around the radar is clear before beginning radar transmission.

With the chartplotter off, connect your radar as described in

the radar installation instructions.

Turn on the chartplotter.

The radar warms up and a countdown alerts you when the

radar is ready.

Select Radar.

Select a radar mode.

A countdown message appears while the radar is starting up.

20 Radar

Garmin GPSMAP 557 Seite 26

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