4.1 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 - 4 Controls and Indicators - 4.1 General

4.1 General

  4.1.1 Change of channel should be capable of being made as rapidly as possible, but in any event within 5 s.

  4.1.2 The time taken to switch from the transmit to the receive condition, and vice versa, should not exceed 0.3 s.

  4.1.3 An on/off switch should be provided for the entire installation with a visual indication that the installation is switched on.

  4.1.4 A visual indication that the carrier is being transmitted should be provided.

  4.1.5 The equipment should indicate the channel number, as given in the Radio Regulations, to which it is tuned. It should allow the determination of the channel number under all conditions of external lighting. Where practicable, channels 16 and 70 should be distinctively marked.

  4.1.6 Control of the equipment should be possible at the position from which the ship is normally navigated. Control from that position should have priority if additional control units are provided. When there is more than one control unit, indication should be given to the other units that the equipment is in operation.

  4.1.7 The equipment should not be able to transmit during a channel switching operation.

  4.1.8 Operation of the transmit/receive control should not cause unwanted emissions.

Parent topic: 4 Controls and Indicators
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