Garmin 2006 Manuale Proprietario

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PPENDIX

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D

IGITAL

 S

ELECTIVE

 C

ALLING

 (DSC)

The GPSMAP 3206/3210 is capable of receiving WAAS satellite signals. WAAS 

is an FAA (Federal Aviation Administration) funded project to improve the 

overall accuracy and integrity of the GPS signal for aviation use, but land and 

sea-based users can also benefit from this system.. There are currently two WAAS 

satellites that can be received in the U.S.A., one over the Atlantic Ocean and one 

over the Pacific Ocean, in a geostationary orbit over the equator. 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 3206/3210. 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 field. To learn more about the WAAS system, its satellite locations 

and current state of development, visit the FAA web site (

Because WAAS requires CPU resources of the GPSMAP 3206/3210 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.

1.  On the 

GPS tab, highlight the Setup sub tab.

2.  Use the 

ROCKER to highlight the WAAS field, and press ENTER.

3.  Highlight 

On or Off, and press ENTER. 

When the Garmin GPSMAP 3206/3210 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 3206/3210 & GPS 17 Installation 

Instructions. 

DSC uses marine VHF radio and 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 other boats. When a DSC position is received, the mariner can 

choose to create a waypoint or to 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 callers position to assist or 

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

they can immediately access the callers information (such as who they are and the 

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

This makes DSC a time-saver, especially in an emergency situation. To use DSC, 

users must first register their VHF radio with the FCC and receive a Maritime 

Mobile Service Identity (MMSI) number.