Ingangsdatum: 23-11-1996
2.1 The installation, which may consist of more than
one piece of equipment, should be capable of operating on single-frequency
channels or on single- and two-frequency channels.
2.2 The equipment should provide for the following
categories of calling, using both voice and digital selective calling (DSC):
.1 distress, urgency and safety;
.2 ship operational requirements; and
.3
public correspondence.
2.3 The
equipment should provide for the following categories of communications, using
voice and, optionally, narrow-band direct printing (NBDP):
.1 distress, urgency and safety;
.2 ship
operational requirements; and
.3 public correspondence.
2.4 The equipment should comprise at
least:
.1 a transmitter/receiver, including antenna;
.2 an integral control unit or one or more separate control
units;
.3 a microphone with a press-to-transmit switch,
which may be combined with a telephone in a handset;
.4
an internal or external loudspeaker;
.5 an integral or
separate digital selective calling facility; and
.6 a
dedicated DSC watchkeeping facility to maintain a continuous watch on the distress
channel.
2.5 A distress alert should be
activated only by means of a dedicated distress button. This button should not be
any key of an ITU-T digital input panel or an ISO keyboard provided on the
equipment.
2.6 The dedicated distress
button should:
.1 be clearly identified; and
.2 be protected against inadvertent operation.
2.7 The distress alert initiation should
require at least two independent actions.
2.8 The equipment should indicate the status of the distress alert
transmission.
2.9 It should be possible
to interrupt and initiate distress alerts at any time.