VTS in selected areas. Port Operations 67 156.375 156.375 Commercial. 157.025 157.025 Commercial 81A 157.075 157.075 U.S. Government only - Environmental protection operations. 157.425 162.025 Public Correspondence in selected areas only. 157.425 Commercial, Intership only.
Frequencies are in MHz.
Channel 16 is used for calling other stations or for distress alerting. Channel 13 should be used to contact a ship when there is danger of collision. All ships of length 20m or greater are required to guard VHF channel 13, in addition to VHF channel 16, when operating within U.S. territorial waters. Users may be fined by the FCC for improper use of these channels. 168.500 Several Frequencies are duplicated because of geographic location and use.