| Channel Number |
Ship Transmit MHz |
Ship Receive MHz |
Use |
| 01A |
156.050 |
156.050 |
Port Operations and Commercial, VTS. Available only in New Orleans / Lower Mississippi area. |
| 05A |
156.250 |
156.250 |
Port Operations or VTS in the Houston, New Orleans and Seattle areas. |
| 06 |
156.300 |
156.300 |
Intership Safety |
| 07A |
156.350 |
156.350 |
Commercial |
| 08 |
156.400 |
156.400 |
Commercial (Intership only) |
| 09 |
156.450 |
156.450 |
Boater Calling. Commercial and Non-Commercial. |
| 10 |
156.500 |
156.500 |
Commercial |
| 11 |
156.550 |
156.550 |
Commercial. VTS in selected areas. |
| 12 |
156.600 |
156.600 |
Port Operations. VTS in selected areas. |
| 13 |
156.650 |
156.650 |
Intership Navigation Safety (Bridge-to-bridge). Ships >20m length maintain a listening watch on this channel in US waters. |
| 14 |
156.700 |
156.700 |
Port Operations. VTS in selected areas. |
| 15 |
-- |
156.750 |
Environmental (Receive only). Used by Class C EPIRBs. |
| 16 |
156.800 |
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 |
156.850 |
State & local govt maritime control |
| 18A |
156.900 |
156.900 |
Commercial |
| 19A |
156.950 |
156.950 |
Commercial |
| 20 |
157.000 |
161.600 |
Port Operations (duplex) |
| 20A |
157.000 |
157.000 |
Port Operations |
| 21A |
157.050 |
157.050 |
U.S. Coast Guard only |
| 22A |
157.100 |
157.100 |
Coast Guard Liaison and Maritime Safety Information Broadcasts. Broadcasts announced on channel 16. |
| 23A |
157.150 |
157.150 |
U.S. Coast Guard only |
| 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 |
157.400 |
162.000 |
Public Correspondence (Marine Operator) |
| 63A |
156.175 |
156.175 |
Port Operations and Commercial, VTS. Available only in New Orleans / Lower Mississippi area. |
| 65A |
156.275 |
156.275 |
Port Operations |
| 66A |
156.325 |
156.325 |
Port Operations |
| 67 |
156.375 |
156.375 |
Commercial. Used for Bridge-to-bridge communications in lower Mississippi River. Intership only. |
| 68 |
156.425 |
156.425 |
Non-Commercial |
| 69 |
156.475 |
156.475 |
Non-Commercial |
| 70 |
156.525 |
156.525 |
Digital Selective Calling (voice communications not allowed) |
| 71 |
156.575 |
156.575 |
Non-Commercial |
| 72 |
156.625 |
156.625 |
Non-Commercial (Intership only) |
| 73 |
156.675 |
156.675 |
Port Operations |
| 74 |
156.725 |
156.725 |
Port Operations |
| 77 |
156.875 |
156.875 |
Port Operations (Intership only) |
| 78A |
156.925 |
156.925 |
Non-Commercial |
| 79A |
156.975 |
156.975 |
Commercial. Non-Commercial in Great Lakes only |
| 80A |
157.025 |
157.025 |
Commercial. Non-Commercial in Great Lakes only |
| 81A |
157.075 |
157.075 |
U.S. Government only - Environmental protection operations. |
| 82A |
157.125 |
157.125 |
U.S. Government only |
| 83A |
157.175 |
157.175 |
U.S. Coast Guard only |
| 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 |
157.375 |
Public Correspondence (Marine Operator) |
| 88A |
157.425 |
157.425 |
Commercial, Intership only. |
| AIS 1 |
161.975 |
161.975 |
Automatic Identification System (AIS) |
| AIS 2 |
162.025 |
162.025 |
Automatic Identification System (AIS) |