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Chapter 5: Digital Selective Calling (DSC)
The Ray49 includes equipment for Class “D” Digital Selective Calling (DSC). DSC
protocol is a globally applied system used to send and receive digital calls. DSC
uses a unique Maritime Mobile Service Identity (MMSI) number to direct DSC calls
directly to your radio, much like a telephone number.
Note:
An MMSI number is required to operate the DSC equipment in this radio. You can
obtain an MMSI from BoatUS (www.boatus.com). Once obtained, you can program the
MMSI number yourself one time only using the operation described in “My MMSI ID“ on
page 82. Otherwise, your Raymarine dealer can program or change the number for you.
The Ray49 includes a separate dedicated receiver just for DSC communications on
channel 70. When a DSC call is received, the radio automatically responds based
on the type of call. When receiving a DSC call from another vessel or a coast
station, an alert sounds and DSC data appears in the LCD–such as time of a call,
the caller and the type and priority of a call.
5.1 DSC Call Menu
You access DSC functions via the DSC menu. Press and hold the MENU/DSC key
for 3 seconds to enter DSC call mode.
Note:
Distress calls are made using the DISTRESS key.
The Ray49 can make the following type of DSC calls:
DSC Call
Type
Description
DISTRESS
Sends out your MMSI number and nature of your Distress along with
the position and time information from the input NMEA data. This dig-
ital information lets other ships and shore stations equipped with
appropriate DSC equipment know where you are and that you are in a
Distress situation. Distress Calls are made using the DISTRESS key.
INDIVIDUAL
Makes a ROUTINE DSC call to a specific station identified by its MMSI
number.
D10165-1
10
15
20
25
30
35
40
45
50
55 60 5
DSC MENU
>INDIVIDUAL
GROUP
ALL SHIPS
