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 calls using both voice and digital selective calling
(DSC):
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.1 distress, urgency and safety;
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.2 ship operational requirements; and
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.3 public correspondence.
2.3 The equipment should provide for the following
categories of communications using voice:
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.1 distress, urgency and safety;
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.2 ship operational requirements; and
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.3 public correspondence.
2.4 The equipment should comprise at least:
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.1 a transmitter/receiver including antenna;
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.2 an integral control unit or one or more separate
control units;
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.3 a microphone with a press-to-transmit switch,
which may be combined with a telephone in a handset;
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.4 an internal or external loudspeaker;
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.5 an integral or separate digital selective calling
facility; and
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.6 a dedicated DSC watchkeeping facility to maintain
a continuous watch on channel 70.
2.5 The installation may also include additional
receivers.
2.6 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.
2.9 The equipment should indicate the status of
the distress alert transmission.