Garmin 2006 Manuale Proprietario

A

PPENDIX

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D

IGITAL

 S

ELECTIVE

 C

ALLING

 (DSC)

When your GPSMAP 2106/2110 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 2106/2110 & GPS 17 Installation 

Instructions. 

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 position 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 they are 

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

location.

Any time a vessel receives a DSC call, the vessel can store that location and 

quickly navigate to that position using a Go To. 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. 

Maritime Mobile Service Identity (MMSI) allows a VHF radio to act like a 

phone. To make a “call” on a phone, you first need a phone number to dial. The 

9-digit MMSI number acts like a phone number when used in a Position Report 

and as a unique identifier to the Coast Guard when used in an emergency distress 

call. To obtain a Maritime Mobile Service Identity (MMSI) number, users must 

register their VHF radio with the FCC (Form 605). Garmin does not supply this 

number! 

Non-commercial users (recreational users who remain in domestic waters and 

only carry VHF, EPIRB (Emergency Position Indicating Radio Beacons, and 

Radar)) are not required to have a FCC ship station license. The FCC and Coast 

Guard have authorized some second and third-party vendors to assign MMSI 

numbers. This service is limited to registering recreational vessels only. To 

receive information on how to obtain a recreational MMSI number, visit  

. 

Commercial users, or those who travel outside the U.S.A. or Canada, must apply 

for a ship station license, or an amendment to a ship station license. To find out if 

the application/licensing process when you file FCC Forms 159 and 605.