83
DSC
(
D
IGITAL
S
ELECTIVE
C
ALLING
)
Digital Selective Calling is a semi-automated method of establishing a radio call, it
has been designed by the International Maritime Organization (IMO) as an interna-
tional standard for establishing VHF, MF and HF radio calls. It had also been desig-
nated part of the Global Maritime Distress and Safety System (GMDSS). It is planed
that DSC will eventually replaced aural watches on distress frequencies and will be
used to announce routine and urgent maritime safety information broadcasts.
This new service will allow mariners to instantly send a distress call with GPS posi-
tion (when connected to the transceiver) to the USA Coast Guard and other vessel
within range of transmission. DSC will also allow mariners to initiate or receive
distress, urgency, safety and routine calls to or from another vessel equipped with a
DSC transceiver.
D
ISTRESS
C
ALL
Distress call and Position Request are functions performed by an external device
(VHF DSC radio) connected to NMEA Input Port. The
MAGNUM
allows display-
ing and saving as marks Distress Calls and Position Requests sent by the VHF radio.
When a Distress Call or Position Request is received the
MAGNUM
will automati-
cally mark the position on the Track page and add same the received position as a
mark. A pop-up screen advises the user that a Distress Call or Position Request Call
has been received. Within the pop-up screen it asks the user if he would like to:
“GOTO VESSEL” activates the navigation to the Distress Call or Position Request
icon. The
MAGNUM
will automatically change the TRACK PAGE to allow show
the Distress Call (or Position Request).
Connecting the
NMEA Data Cable
Summary of Contents for MAGNUM NAV-40
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