This section describes the carrier frequencies assignable for ship-to-ship and ship-to-coast private communications.
Carrier frequency (kHz) | Geographic area |
2003.0 | Great Lakes only. |
2082.51 2 | All areas. |
2093.01 | All areas. |
2142.0 | Pacific coast areas south of 42 degrees north on a day basis only. |
2203.02 | Gulf of Mexico. |
2214.01 | All areas. |
2638.01 | All areas. |
2670.0 | All areas. |
2738.01 | All areas except the Great Lakes. |
2830.0 | Gulf of Mexico only. |
1 Limited to a peak envelope power of 150 watts.
2 Available on a secondary basis for intership communications by ships involved in non-commercial fishing.
Business and Operational Frequencies in the 2000-27500 kHz Band; Carrier Frequencies (kHz)
2065.01 3 | 4146 | 6224 | 8294 | 12353 | 16528 | 18840 | 22159 | 25115 |
2079.01 3 | 4149 | 6227 | 8297 | 12356 | 16531 | 18843 | 22162 | 25118 |
2096.51 | 41252 | 6230 | 123596 | 16534 | 22165 | |||
3023.04 | 44175 | 6516 | 22168 | |||||
56804 | 22171 |
1 Limited to peak envelope power of 150 watts.
2 The frequency 4125 kHz is also available for distress and safety, and calling and reply, see § 80.369 (b) and (d) of this part.
3 The frequencies 2065.0 kHz and 2079.0 kHz must be coordinated with Canada.
4 The frequencies 3023.0 kHz and 5680.0 kHz are available to private coast stations licensed to state and local governments and any scene-of-action ships for the purpose of search and rescue scene-of-action coordination including communications with any scene-of-action aircraft.
5 The frequency 6516 kHz is limited to daytime operations. The frequencies 4417 kHz and 6516 kHz are also available for calling and reply, see § 80.369(d) of this part.
6 The alternative carrier frequency 12359 kHz may be used by ship stations and coast stations for calling on a simplex basis, provided that the peak envelope power does not exceed 1 kW.
Frequency Bands (kHz)
2107-2170 4750-4850
2194-2495 5060-5450
2505-2850 5700-59501
3155-3400 7300-81001
4438-4650
1 After April 1, 2007, use of the sub-bands 5900-5950 kHz and 7300-7350 kHz shall be on the condition that harmful interference is not caused to HF broadcasting.
Frequencies in the 156-162 MHz Band
Channel designator | Carrier frequency (MHz) ship transmit | Carrier frequency (MHz) coast transmit | Points of communication (intership and between coast and ship unless otherwise indicated) |
Port Operations | |||
01A1 | 156.050 | 156.050 | |
63A1 | 156.175 | 156.175 | |
05A2 | 156.250 | 156.250 | |
65A | 156.275 | 156.275 | |
66A | 156.325 | 156.325 | |
123 | 156.600 | 156.600 | |
73 | 156.675 | 156.675 | |
143 | 156.700 | 156.700 | |
74 | 156.725 | 156.725 | |
774 | 156.875 | Intership only. | |
20A12 | 157.000 | Intership only. | |
Navigational (Bridge-to-Bridge)5 | |||
677 | 156.375 | 156.375 | |
136 | 156.650 | 156.650 | |
Commercial | |||
01A1 | 156.050 | 156.050 | |
63A1 | 156.175 | 156.175 | |
07A | 156.350 | 156.350 | |
677 | 156.375 | Intership only. | |
08 | 156.400 | Do. | |
09 | 156.450 | 156.450 | |
10 | 156.500 | 156.500 | |
113 | 156.550 | 156.550 | |
7214 | 156.625 | Intership only. | |
18A | 156.900 | 156.900 | |
19A | 156.950 | 156.950 | |
79A | 156.975 | 156.975 | |
80A | 157.025 | 157.025 | |
88A8 | 157.425 | 157.425 | |
Digital Selective Calling | |||
7015 | 156.525 | 156.525 | |
Noncommercial | |||
6714 | 156.375 | Intership only. | |
6817 | 156.425 | 156.425 | |
0916 | 156.450 | 156.450 | |
69 | 156.475 | 156.475 | |
7118 | 156.575 | 156.575 | |
72 | 156.625 | Intership only. | |
78A | 156.925 | 156.925 | |
79A | 156.975 | 156.975 | Great Lakes only. |
80A | 157.025 | 157.025 | Do. |
Distress, Safety and Calling | |||
16 | 156.800 | 156.800 | |
Intership Safety | |||
06 | 156.300 | a. Intership, or b. For SAR: Ship and aircraft for the U.S. Coast Guard. | |
Environmental | |||
1513 | 156.750 | Coast to ship only. | |
Maritime Control | |||
179 10 | 156.850 | 156.850 | |
Liaison and Safety Broadcasts, U.S. Coast Guard | |||
22A11 | 157.100 | 157.100 | Ship, aircraft, and coast stations of the U.S. Coast Guard and at Lake Mead, Nev., ship and coast stations of the National Park Service, U.S. Department of the Interior. |
1 156.050 MHz and 156.175 MHz are available for port operations and commercial communications purposes when used only within the U.S. Coast Guard designated Vessel Traffic Services (VTS) area of New Orleans, on the lower Mississippi River from the various pass entrances in the Gulf of Mexico to Devil's Swamp Light at River Mile 242.4 above head of passes near Baton Rouge.
2 156.250 MHz is available for port operations communications use only within the U.S. Coast Guard designated VTS radio protection areas of New Orleans and Houston described in § 80.383 . 156.250 MHz is available for intership port operations communications used only within the area of Los Angeles and Long Beach harbors, within a 25-nautical mile radius of Point Fermin, California.
3 156.550 MHz, 156.600 MHz and 156.700 MHz are available in the U.S. Coast Guard designated port areas only for VTS communications and in the Great Lakes available primarily for communications relating to the movement of ships in sectors designated by the St. Lawrence Seaway Development Corporation or the U.S. Coast Guard. The use of these frequencies outside VTS and ship movement sector protected areas is permitted provided they cause no interference to VTS and ship movement communications in their respective designated sectors.
4 Use of 156.875 MHz is limited to communications with pilots regarding the movement and docking of ships. Normal output power must not exceed 1 watt.
5 156.375 MHz and 156.650 MHz are available primarily for intership navigational communications. These frequencies are available between coast and ship on a secondary basis when used on or in the vicinity of locks or drawbridges. Normal output power must not exceed 1 watt. Maximum output power must not exceed 10 watts for coast stations or 25 watts for ship stations.
6 On the Great Lakes, in addition to bridge-to-bridge communications, 156.650 MHz is available for vessel control purposes in established vessel traffic systems. 156.650 MHz is not available for use in the Mississippi River from South Pass Lighted Whistle Buoy "2" and Southwest Pass entrance Mid-channel Lighted Whistle Buoy to mile 242.4 above Head of Passes near Baton Rouge. Additionally it is not available for use in the Mississippi River-Gulf Outlet, the Mississippi River-Gulf Outlet Canal, and the Inner Harbor Navigational Canal, except to aid the transition from these areas.
7 Use of 156.375 MHz is available for navigational communications only in the Mississippi River from South Pass Lighted Whistle Buoy "2" and Southwest Pass entrance Mid-channel Lighted Whistle Buoy to mile 242.4 above Head of Passes near Baton Rouge, and in addition over the full length of the Mississippi River-Gulf Outlet Canal from entrance to its junction with the Inner Harbor Navigational Canal, and over the full length of the Inner Harbor Navigational Canal from its junction with the Mississippi River to its entry to Lake Pontchartrain at the New Seabrook vehicular bridge.
8 Within that portion of VHF Public Coast Station Areas (VPCSAs) 1 through 9 listed in the table in Section 80.371(c)(1)(ii) within 120 km (75 miles) of the United States/Canada border, in the area of the Great Lakes, the Saint Lawrence Seaway, and the Puget Sound and the Strait of Juan de Fuca and its approaches, Maritime VHF Channel 88A (157.425 MHz) is available for use for public correspondence communications, subject to prior coordination with Canada. Maritime VHF Channel 88B (162.025 MHz) is available only for Automatic Identification System communications. One hundred twenty kilometers (75 miles) from the United States/Canada border, 157.425 MHz is available for intership and commercial communications. Outside the Puget Sound area and its approaches and the Great Lakes, 157.425 MHz is available for communications between commercial fishing vessels and associated aircraft while engaged in commercial fishing activities.
9 When the frequency 156.850 MHz is authorized, it may be used additionally for search and rescue training exercises conducted by state or local governments.
10 The frequency 156.850 MHz is additionally available to coast stations on the Great Lakes for transmission of scheduled Coded Marine Weather Forecasts (MAFOR), Great Lakes Weather Broadcast (LAWEB) and unscheduled Notices to Mariners or Bulletins. F3C and J3C emissions are permitted. Coast stations on the Great Lakes must cease weather broadcasts which cause interference to stations operating on 156.800 MHz until the interference problem is resolved.
11 The frequency 157.100 MHz is authorized for search and rescue training exercises by state or local government in conjunction with U.S. Coast Guard stations. Prior U.S. Coast Guard approval is required. Use must cease immediately on U.S. Coast Guard request.
12 The duplex pair for channel 20 (157.000/161.600 MHz) may be used for ship to coast station communications.
13 Available for assignment to coast stations, the use of which is in accord with an agreed program, for the broadcast of information to ship stations concerning the environmental conditions in which vessels operate, i.e., weather; sea conditions; time signals; notices to mariners; and hazards to navigation.
14 Available only in the Puget Sound and the Strait of Juan de Fuca.
15 The frequency 156.525 MHz is to be used exclusively for distress, safety and calling using digital selective calling techniques. No other uses are permitted.
16 The frequency 156.450 MHz is available for intership, ship and coast general purpose calling by noncommercial vessels, such as recreational boats and private coast stations.
17 The frequency 156.425 MHz is assigned by rule to private coast stations in Alaska for facsimile transmissions as well as voice communications.
18 156.575 MHz is available for port operations communications use only within the U.S. Coast Guard designated VTS radio protection area of Seattle (Puget Sound) described in § 80.383 . Normal output power must not exceed 1 watt. Maximum output power must not exceed 10 watts.
Frequencies for On-Board Communications
Channel | Carrier frequency (MHz) | |
On-board mobile station | On-board repeater station1 | |
1 | 467.750 | 457.525 |
2 | 467.775 | 457.550 |
3 | 467.800 | 457.575 |
4 | 467.825 | 457.600 |
1 These frequencies may also be assigned to mobile stations for single frequency simplex operation.
Repeater receive: 157.275 MHz
Repeater transmit: 161.875 MHz
Private communications in Alaska Carrier frequencies (kHz)
1619.03 | 2382.0 | 2563.0 |
1622.03 | 2419.0 | 2566.0 |
1643.03 | 2422.0 | 2590.0 |
1646.03 | 2427.0 | 2616.0 |
1649.03 | 2430.0 | 3258.0 |
1652.03 | 2447.0 | 1 3261.0 |
1705.03 | 2450.0 | 4366.0 |
1709.0 | 2479.0 | 4369.0 |
1712.0 | 2482.0 | 4396.0 |
2003.0 | 2506.0 | 4402.0 |
2006.0 | 2509.0 | 4420.0 |
2115.0 | 2512.0 | 4423.0 |
2118.0 | 2535.0 | 2 5167.5 |
2379.0 | 2538.0 |
1 Ship stations must limit use of 3261.0 kHz to communications over distances which cannot be reached by the use of frequency below 2700 kHz or above 156.000 MHz.
2 The frequency 5167.5 kHz is available for emergency communications in Alaska. Peak envelope power of stations operating on this frequency must not exceed 150 watts. When a station in Alaska is authorized to use 5167.5 kHz, such station may also use this frequency for calling and listening for the purpose of establishing communications.
3 Use of these frequencies is on a secondary basis to Region 2 broadcasting.
47 C.F.R. §80.373
For Federal Register citations affecting §80.373, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.fdsys.gov.