10 Loudspeaker and Telephone Handset (radiotelephone facility)
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 - 10 Loudspeaker and Telephone Handset (radiotelephone facility)

10 Loudspeaker and Telephone Handset (radiotelephone facility)

  10.1 The receiver output should be suitable for use with a loudspeaker or a telephone handset. The audio output should be sufficient to be heard in the ambient noise level likely to be encountered on board ships.

  10.2 It should be possible to switch off the loudspeaker without affecting the audio output of the telephone handset, if provided.

  10.3 In the transmit condition during simplex operation, the output of the receiver should be muted.

  10.4 In the transmit condition during duplex operation, only the telephone handset should be in circuit. Care should be taken to prevent any electrical or acoustic feedback, which could cause singing.


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