2 General
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Assembly - IMO Resolution A.803(19) Performance Standards for Shipborne VHF Radio Installations Capable of Voice Communication and Digital Selective Calling (Adopted on 23 November 1995) - Annex - Recommendation on Performance Standards for Shipborne VHF Radio Installations Capable of Voice Communication and Digital Selective Calling - 2 General

2 General

  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):

  • .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:

  • .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 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.

  2.8 The distress alert initiation should require at least two independent actions.

  2.9 The equipment should indicate the status of the distress alert transmission.

  2.10 It should be possible to interrupt and initiate distress alerts at any time.


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