Sec. 80.148  Watch on 156.8 MHz (Channel 16).

    At least one VHF ship station per compulsory vessel while underway 
must maintain a watch on 156.800 MHz whenever such station is not being 
used for exchanging communications. The watch is not required:
    (a) Where a ship station is operating only with handheld bridge-to-
bridge VHF radio equipment under Sec. 80.143(c) of this part;
    (b) For vessels subject to the Bridge-to-Bridge Act and 
participating in a Vessel Traffic Service (VTS) system when the watch is 
maintained on both the bridge-to-bridge frequency and a separately 
assigned VTS frequency; or
    (c) For a station on board a voluntary vessel equipped with digital 
selective calling (DSC) equipment, maintaining a continuous DSC watch on 
156.525 MHz whenever such station is not being used for exchanging 
communications, and while such station is within the VHF service area of 
a U.S. Coast Guard radio facility which is DSC equipped.
[ 51 FR 31213 , Sept. 2, 1986, as amended at  58 FR 16504 , Mar. 29, 1993]

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