Channel Number Ship Transmit MHz Ship Receive MHz 1 156.050 160.650 Port Operations and Commercial, VTS. 2 156.100 160.700 3 156.150 160.750 4 156.200 160.800 5 156.250 160.850 Port Operations or VTS 6 156.300 156.300 Intership Safety 7 156.350 160.950 Intership Safety 8 156.400 Commercial (Intership only) 9 156.450 Boater Calling.  Commercial and Non-Commercial. 10 156.500 Commercial 11 156.550 Commercial.  VTS in selected areas. 12 156.600 Port Operations.  VTS in selected areas. 13 156.650 Intership Navigation Safety (Bridge-to-bridge).  Ships >20m length maintain a listening watch on this channel in US waters. 14 156.700 Port Operations.  VTS in selected areas. 15 156.750 Environmental (Receive only).  Used by Class C EPIRBs. 16 156.800 International Distress, Safety and Calling.  Ships required to carry radio, USCG, and most coast stations maintain a listening watch on this channel. 17 156.850 State Control 18 156.900 161.500 Commercial 19 156.950 161.550 Commercial 20 157.000 161.600 Port Operations (duplex) 21 157.050 161.650 22 157.100 161.700 Broadcasts announced on channel 16. 23 157.150 161.750 24 157.200 161.800 Public Correspondence (Marine Operator) 25 157.250 161.850 Public Correspondence (Marine Operator) 26 157.300 161.900 Public Correspondence (Marine Operator) 27 157.350 161.950 Public Correspondence (Marine Operator) 28 157.500 162.000 Public Correspondence (Marine Operator) 60 156.025 160.625 61 156.075 160.675 62 156.125 160.725 63 156.175 160.775 Port Operations and Commercial, VTS. 64 156.225 160.825 65 156.275 160.875 Port Operations 66 156.325 160.925 Port Operations 67 156.375 Commercial.  Used for Bridge-to-bridge communications 68 156.425 Non-Commercial 69 156.475 Non-Commercial 70 156.525 Digital Selective Calling (voice communications not allowed) 71 156.575 Non-Commercial 72 156.625 Non-Commercial (Intership only) 73 156.675 Port Operations 74 156.725 Port Operations 77 156.875 Port Operations (Intership only) 78 156.925 161.525 Non-Commercial 79 156.975 161.575 Commercial. 80 157.025 161.625 Commercial. 81 157.075 161.675 82 157.125 161.725 83 157.175 161.775 84 157.225 161.825 Public Correspondence (Marine Operator) 85 157.275 161.875 Public Correspondence (Marine Operator) 86 157.325 161.925 Public Correspondence (Marine Operator) 87 157.375 161.975 Public Correspondence (Marine Operator) 87A 157.375 88 157.425 162.025 Commercial, Intership only.