TM 55-1930-209-14&P-1 Table 5-2.  Frequency/Channel Chart for Commercial Marine Radios in USA Channel TX frequency Rx frequency Channel assignment 65 156.275 156.275 Port operations-intership-ship/coast 66 156.325 156.325 Port operations-intership-ship/coast 67 156.375 156.375 Commercial intership 68 156.425 156.425 Noncommercial intership-ship/coast 69 156.475 156.475 Noncommercial intership-ship/coast 70 156.525 156.525 Noncommercial intership 71 156.575 156.575 Noncommercial intership-ship/coast 72 156.625 156.625 Noncommercial intership 73 156.675 156.675 Port operations-intership-ship/coast 74 156.725 156.725 Port operations-intership-ship/coast 77 156.875 156.875 Commercial intership 78 156.925 156.925 Noncommercial intership-ship/coast 79 156.975 156.975 Commercial intership-ship/coast 80 157.025 157.025 Commercial intership-ship/coast 81 157.075 157.075 US government only 82 157.125 157.125 US government only 83 157.175 157.175 US government only 84 157.225 157.825 Public-ship/coast 85 157.275 161.875 Public-ship/coast 86 157.325 161.925 Public-ship/coast 87 157.375 161.975 Public-ship/coast 88 157.425 157.425 Commercial intership _______________________________________ NOTE Following procedures are performed using the controls and receptacles on top of the  walkie-talkie.    Each  walkie-talkie  must  have  a  VHF  antenna.    If  one  is  not available,  obtain  part  number  from  Appendix  G  in  TM  55-1930-209-14&P-12  and requisition a replacement. 5-19