Garmin GPSMAP 296 사용자 설명서

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 show the locations of one another. When you receive a DSC 

location, you can create a waypoint or to show the received location 

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 location of the caller. 
The rescuer can 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 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, they can store that location 

and quickly navigate to that location using a Go To. This makes 

DSC a time-saver, especially in an emergency situation. In order 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) basically allows a VHF 

radio to act like a phone. 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! 
For more information regarding MMSI’s visit  

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 (DSC)