11.1 The facility should conform to the provisions
of the relevant ITU-R Recommendations pertaining to the DSC system.footnote
11.2 The DSC facility should comprise:
.1 means to decode and encode DSC messages;
.2 means necessary for composing the DSC message;
.3 means to verify the prepared message before
it is transmitted;
.4 means to display the information contained
in a received call in plain language;
.5 facilities to automatically update the ship's
position and the time at which the position was determined from a
suitable electronic position-fixing aid which may be an integral part
of the equipment. For equipment which does not have an integral position-fixing
aid, such facilities should include a suitable interface conforming
to the appropriate international standard;footnote
.6 means for manual entry of position information
and the time at which the position was determined; and
.7 means to activate an alarm when no position
data is received from the electronic position-fixing aid or, in the
case of manual input, the position information is over 4 hours old.
Any position information not updated for more than 23½ hours
should be erased.
Distress message storage
11.3.1 If the received messages are not printed
immediately, sufficient capacity should be provided to enable at least
20 received distress messages to be stored in the DSC facility.
11.3.2 These messages should be stored until readout
and should be erased 48 hours after their reception.
11.4 It should be possible to initiate and make
distress and safety calls from the position from which the ship is
normally navigated. The means for initiating a distress alert should
be as prescribed in 2.6 to 2.8.
11.5 Initiation of DSC distress calls should supersede
any other operation of the facility.
11.6 Self-identification data should be stored
in the DSC unit. It should not be possible for the user easily to
change these data.
11.7 Means should be provided to enable routine
testing of the DSC facilities without radiation of signals.
11.8 Provision should be made for:
.1 a specific aural alarm and visual indication
to indicate receipt of a distress or urgency call or a call having
distress category. It should not be possible to disable this alarm
and indication. Provision should be made to ensure that they can be
reset only manually; and
.2 aural alarms and visual indication for calls
other than distress and urgency.