Sec. 80.874  VHF radiotelephone receiver.

    (a) The receiver used for providing the watch for navaigational 
safety required by Sec. 80.313 must be type accepted by the Commission 
and capable of effective reception of G3E emission on the frequencies 
required by Sec. 80.871(d)

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when connected to the antenna specified in Sec. 80.876.
    (b) The receiver must have a usable sensitivity of 0.5 microvolts.
    (c) The receiver must deliver adequate audio output power to be 
heard in the ambient noise level likely to be expected on board ships 
with a loudspeaker and/or a telephone handset.
    (d) In the simplex mode when the transmitter is activated the 
receiver output must be muted.