Furuno FS-1575 FS-2575 FS-5075 User Manual

3.  DSC OVERVIEW

•  Calling category

•  Station ID (MMSI)

Your ship ID and sending station ID. Coast station ID begins with 00; Group ID be-
gins with 0.

•  Priority

Distress: Grave and imminent danger and request immediate assistance.
Urgency: A calling station has a very urgent call to transmit concerning safety of 
ship, aircraft or other vehicle or safety of person.
Safety: A station is about to transmit a call containing an important navigational or 
meteorological warning.
Routine: General calling

•  Communication mode

TELEPHONE: Telephone (J3E) by SSB radiotelephone
NBDP-ARQ*: Telex (J2B) mode ARQ via NBDP Terminal Unit
NBDP-FEC*: Telex (J2B) mode FEC via NBDP Terminal Unit
*: NBDP terminal unit is required.

•  Communication frequency

Working frequency used to call by telephone or NBDP. The sending station may 
have the receiving station (ship or coast station) assign the frequency to use.

•  Position

Position can be automatically or manually set.

•  DSC frequency

DSC frequency to use. If the call priority is SAFETY, URGENCY or DISTRESS, se-
lect a DSC distress frequency.

•  End code

The end of a DSC call is indicated with "EOS" (acknowledgement, acknowledge-
ment required, no acknowledgement required). 

When you receive a distress alert or general call addressed to your ship, the audio and 
visual alarms are released. The audio alarm can be silenced with the CANCEL key.

DISTRESS

DISTRESS ALERT, DISTRESS RELAY AREA, DISTRESS
RELAY INDIVIDUAL

GENERAL

MEDICAL MSG, NEUTRAL MSG, INDIVIDUAL MSG, PSTN MSG, 
TEST MSG, GROUP MSG, AREA MSG, POSITION MSG,
POLLING MSG

Safety call received

750 Hz and 650 Hz (50 ms)

Routine call received

750 Hz and 650 Hz (50 ms)

While DISTRESS key is pressed for four 
seconds

2000 Hz and 0 Hz (500 ms)