Bedienungsanleitung Garmin GPSMAP3005C (Seite 107 von 124) (Englisch)

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GPSMAP 3005C Owner’s Manual 99

APPendIX > dIgItAl selectIve cAllIng (dsc)

WAAS Capability

The GPSMAP 3005C is capable of receiving WAAS satellite signals. Effective

use of the WAAS satellite signal may be limited by your geographic location in

relation to those satellites, now in developmental service. WAAS satellite signal

reception requires an absolute clear view of the sky and works best when there

are no nearby obstructions such as buildings or mountains.

WAAS satellites are numbered 33 or higher when viewing the sky view on your

GPSMAP 3005C. Initial reception of the WAAS signal may take up to 15-20

minutes, then 1–2 minutes afterwards. When WAAS differential correction has

been received for GPS satellites (numbers 32 or below), a “D” appears in the

signal bar of the sky view and “Ready For Navigation with WAAS” appears in

the Status eld. To learn more about the WAAS system, its satellite locations and

current state of development, visit the FAA web site (http://gps.faa.gov).

Because WAAS requires CPU resources of the GPSMAP 3005C to search for

and track the satellites, you can disable the WAAS feature to improve unit

performance if WAAS reception is not available in your area.

To disable or enable WAAS:

1. On the GPS tab, highlight the Setup sub tab.

2. Use the ROCKER to highlight the WAAS eld, and press ENTER.

3. Highlight On or Off, and press ENTER.

Digital Selective Calling (DSC)

When your Garmin GPSMAP 3005C is connected to a VHF radio with DSC

support, the GPS unit displays a Call List, Log, and a Directory to store incoming

information received from another user’s DSC capable VHF/GPS combination.

Basic wiring is required for the Garmin unit and VHF radio to send and receive

NMEA data from each other. See the GPSMAP 3005C & GPS 17 Installation

Instructions.

What is DSC?

Digital Selective Calling (DSC) uses marine VHF radio and Global Positioning

System (GPS) technologies to transmit and receive location information. DSC

is used by mariners to assist them in two major areas: distress calls and position

reporting.

A non-emergency DSC position report allows mariners to exchange and display

the positions of one another. When a DSC position is received, the mariner can

choose to create a waypoint or show the received position on an electronic map.

An emergency DSC distress call allows a vessel in trouble to transmit a

substantial amount of information in a single transmission or “call” without

the need for voice communication. When any nearby rescuer receives the DSC

signal, an alarm sounds, and they immediately receive the position of the caller.

The rescuer can then choose to navigate (Go To) the caller’s location to assist or

forward the call on to the Coast Guard. When the Coast Guard receives the call,

they can immediately access the caller’s information (such as who the caller is

and the type of vessel) in their database while they are in transit to the caller’s

location.

appendIX

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