VHF Radio Handbook - Marine Radio Licence

56 (48 duplex channels, and 8 simplex channels) for radiotelephone; 1 (Channel 70) is for digital Selective Calling (dSC); and 2 (Channel 87B, AIS1, and 88B, AIS2) are exclusively for Automatic Identification Systems (AIS). range oF VHF due to the propagation conditions at VHF that part of the radio wave emitted from the transmitter (surface or

  Selective, Digital, Calling, Radiotelephone, Digital selective calling