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Ship Ship Channel Transmit Receive Number MHz MHz 01A Use Port Operations and Commercial, VTS. 156.050 156.050 Available only in New Orleans / Lower Mississippi area. 156.250 156.250 Port Operations or VTS in the Houston, New Orleans and Seattle areas. 05A 06 07A 08 09 10 11 12 156.300 156.300 Intership Safety 156.350 156.350 Commercial 156.400 156.400 Commercial (Intership only) 156.450 156.450 Boater Calling. Commercial and Non-Commercial. 156.500 156.500 Commercial 156.550 156.550 Commercial. VTS in selected areas. 156.600 156.600 Port Operations. VTS in selected areas. Intership Navigation Safety (Bridge-to-bridge). Ships >20m length 156.650 156.650 maintain a listening watch on this channel in US waters. 156.700 156.700 Port Operations. VTS in selected areas. -- 156.750 Environmental (Receive only). Used by Class C EPIRBs. 13 14 15 16 International Distress, Safety and Calling. Ships required to carry radio, USCG, and 156.800 156.800 most coast stations maintain a listening watch on this channel. 156.850 156.850 State Control 156.900 156.900 Commercial 156.950 156.950 Commercial 157.000 161.600 Port Operations (duplex) 157.000 157.000 Port Operations 157.050 157.050 U.S. Coast Guard only Coast Guard Liaison and Maritime Safety 157.100 157.100 Information Broadcasts. Broadcasts announced on channel 16. 157.150 157.150 U.S. Coast Guard only 157.200 161.800 Public Correspondence (Marine Operator) 17 18A 19A 20 20A 21A 22A 23A 24 25 26 27 28 63A 65A 66A 67 68 69 70 71 72 73 74 77 78A 79A 80A 81A 82A 83A 84 85 86 87 88A AIS 1 AIS 2 157.250 161.850 Public Correspondence (Marine Operator) 157.300 161.900 Public Correspondence (Marine Operator) 157.350 161.950 Public Correspondence (Marine Operator) 157.400 162.