{"data":{"id":"us/47-cfr-80.357","jurisdiction":"us","citation":"47 CFR 80.357","heading":"Working frequencies for Morse code and data transmission.","body":"This section describes the working frequencies assignable to maritime stations for A1A, J2A, J2B (2000-27500 kHz band only), or J2D (2000-27500 kHz band only) radiotelegraphy.\n(a) Ship station frequencies—(1) Frequencies in the 100-160 kHz band. The following table describes the working carrier frequencies in the 100-160 kHz band which are assignable to ship stations. A ship station may also transmit on a radiotelegraphy working channel of a coast station within the 100-160 kHz band when directed to do so by the coast station provided interference is not caused to any land, fixed, broadcast, or radiolocation station.\n100-160 (kHz)\n152\n153\n154\n155\n156\n157\n158\n(2) Frequencies in the 405-525 kHz band. The following table describes the working carrier frequencies in the 405-525 kHz band which are assignable to ship stations. A ship station may transmit on a radiotelegraphy working channel of a coast station in the 415-490 kHz band when directed to do so by the coast station.\n405-525 (kHz)\n1 410\n425\n454\n468\n480\n2 512\n3 518\n1 The frequency 410 kHz may be used on a secondary basis for the transmission of radiodetermination information and for transmitting by radiotelegraph radiodetermination related messages to direction-finding stations.\n2 The frequency 512 kHz may be used as a supplementary calling frequency when 500 kHz is used for distress, safety and urgency communications. The use of the 512 kHz as a working frequency is prohibited in areas where it is used as a supplementary calling frequency when 500 kHz is used for distress, safety, and urgency communications.\n3 The frequency 518 kHz is a receive only frequency by ship stations. It is used by U.S. Coast Guard coast stations for NB-DP transmissions of meteorological and navigational warnings to ships.\n(3) Frequencies in the 2000-27500 kHz band. This paragraph describes the working frequencies and Channel Series in the 2000-27500 kHz band which are assignable to ship stations.\n(i) Two Channel Series will be assigned for routine use to each ship station. Frequencies from any other Channel Series may be used if the frequencies in the assigned Channel Series are not adequate for communications.\nShip Morse Working Frequencies (kHz)\nChannel Series:\nW1 4187.0 6285.0 8342.0 12422.0 16619.0 22242.0 25161.5\n8343.5 12453.0 16650.0 22273.0\n16681.0\nW2 4187.5 6285.5 8342.5 12422.5 16619.5 22242.5 25162.0\n8344.0 12453.5 16650.5 22273.5\n16681.5\nW3 4188.0 6286.0 8343.0 12423.0 16620.0 22243.0 25162.5\n8344.5 12454.0 16651.0 22274.0\n16682.0\nW4 4188.5 6286.5 8343.5 12423.5 16620.5 22243.5 25163.0\n8345.0 12454.5 16651.5 22274.5\n16682.5\nW5 4189.0 6287.0 8344.0 12424.0 16621.0 22244.0 25163.5\n8345.5 12455.0 16652.0 22275.0\n16683.0\nW6 4189.5 6287.5 8344.5 12424.5 16621.5 22244.5 25164.0\n8346.0 12455.5 16652.5 22275.5\n16619.0\nW7 4190.0 6288.0 8345.0 12425.0 16622.0 22245.0 25164.5\n8346.5 12456.0 16653.0 22276.0\n16619.5\nW8 4190.5 6288.5 8345.5 12425.5 16622.5 22245.5 25165.0\n8347.0 12456.5 16653.5 22276.5\n16620.0\nW9 4191.0 6289.0 8346.0 12426.0 16623.0 22246.0 25165.5\n8347.5 12457.0 16654.0 22277.0\n16620.5\nW10 4191.5 6289.5 8346.5 12426.5 16623.5 22246.5 25166.0\n8348.0 12457.5 16654.5 22270.5\n16621.0\nW11 4192.0 6290.0 8347.0 12427.0 16624.0 22247.0 25166.5\n8348.5 12458.0 16655.0 22278.0\n16621.5\nW12 4192.5 6290.5 8347.5 12427.5 16624.5 22247.5 25167.0\n8349.0 12458.5 16655.5 22278.5\n16622.0\nW13 4193.0 6291.0 8348.0 12428.0 16625.0 22248.0 25167.5\n8349.5 12459.0 16656.0 22279.0\n16622.5\nW14 4193.5 6291.5 8348.5 12428.5 16625.5 22248.5 25168.0\n8350.0 12459.5 16656.5 22242.0\n16623.0\nW15 4194.0 6292.0 8349.0 12429.0 16626.0 22249.0 25168.5\n8350.5 12460.0 16657.0 22242.5\n16623.5\nW16 4194.5 6292.5 8349.5 12429.5 16626.5 22249.5 25169.0\n8351.0 12460.5 16657.5 22243.0\n16624.0\nW17 4195.0 6293.0 8350.0 12430.0 16627.0 22250.0 25169.5\n8351.5 12461.0 16658.0 22243.5\n16624.5\nW18 4195.5 6293.5 8350.5 12430.5 16627.5 22250.5 25170.0\n8352.0 12461.5 16658.5 22244.0\n16625.0\nW19 4196.0 6294.0 8351.0 12431.0 16628.0 22251.0 25170.5\n8352.5 12462.0 16659.0 22244.5\n16625.5\nW20 4196.5 6294.5 8351.5 12431.5 16628.5 22251.5 25171.0\n8353.0 12462.5 16659.5 22245.0\n16626.0\nW21 4197.0 6295.0 8352.0 12432.0 16629.0 22252.0 25161.5\n8353.5 12463.0 16660.0 22245.5\n16626.5\nW22 4197.5 6295.5 8352.5 12432.5 16629.5 22252.5 25162.0\n8354.0 12463.5 16660.5 22246.0\n16627.0\nW23 4198.0 6296.0 8353.0 12433.0 16630.0 22253.0 25162.5\n8354.5 12464.0 16661.0 22246.5\n16627.5\nW24 4198.5 6296.5 8353.5 12433.5 16630.5 22253.5 25163.0\n8355.0 12464.5 16661.5 22247.0\n16628.0\nW25 4199.0 6297.0 8354.0 12434.0 16631.0 22254.0 25163.5\n8355.5 12465.0 16662.0 22247.5\n16628.5\nW26 4199.5 6297.5 8354.5 12434.5 16631.5 22254.5 25164.0\n8356.0 12465.5 16662.5 22248.0\n16629.0\nW27 4200.0 6298.0 8355.0 12435.0 16632.0 22255.0 25164.5\n8356.5 12466.0 16663.0 22248.5\n16629.5\nW28 4200.5 6298.5 8355.5 12435.5 16632.5 22255.5 25165.0\n8357.0 12466.5 16663.5 22249.0\n16630.0\nW29 4201.0 6299.0 8356.0 12436.0 16633.0 22256.0 25165.5\n8357.5 12467.0 16664.0 22249.5\n16630.5\nW30 4201.5 6299.5 8356.5 12436.5 16633.5 22256.5 25166.0\n8358.0 12467.5 16664.5 22250.0\n16631.0\nW31 4202.0 6300.0 8357.0 12437.0 16634.0 22257.0 25166.5\n8358.5 12468.0 16665.0 22250.5\n16631.5\nW32 4202.0 6300.0 8357.5 12437.5 16634.5 22257.5 25167.0\n8359.0 12468.5 16665.5 22251.0\n16632.0\nW33 4201.5 6299.5 8358.0 12438.0 16635.0 22258.0 25167.5\n8359.5 12469.0 16666.0 22251.5\n16632.5\nW34 4201.0 6299.0 8358.5 12438.5 16635.5 22258.5 25168.0\n8360.0 12469.5 16666.5 22252.0\n16633.0\nW35 4200.5 6298.5 8359.0 12439.0 16636.0 22259.0 25168.5\n8360.5 12470.0 16667.0 22252.5\n16633.5\nW36 4200.0 6298.0 8359.5 12439.5 16636.5 22259.5 25169.0\n8361.0 12470.5 16667.5 22253.0\n16634.0\nW37 4199.5 6297.5 8360.0 12440.0 16637.0 22260.0 25169.5\n8361.5 12471.0 16668.0 22253.5\n16634.5\nW38 4199.0 6297.0 8360.5 12440.5 16637.5 22260.5 25170.0\n8362.0 12471.5 16668.5 22254.0\n16635.0\nW39 4198.5 6296.5 8361.0 12441.0 16638.0 22261.0 25170.5\n8362.5 12472.0 16669.0 22254.5\n16635.5\nW40 4198.0 6296.0 8361.5 12441.5 16638.5 22261.5 25171.0\n8363.0 12472.5 16669.5 22255.0\n16636.0\nW41 4197.5 6295.5 8362.0 12442.0 16639.0 22262.0 25161.5\n8363.5 12473.0 16670.0 22255.5\n16636.5\nW42 4197.0 6295.0 8362.5 12442.5 16639.5 22262.5 25162.0\n8364.0 12473.5 16670.5 22256.0\n16637.0\nW43 4196.5 6294.5 8363.0 12443.0 16640.0 22263.0 25162.5\n8364.5 12474.0 16671.0 22256.5\n16637.5\nW44 4196.0 6294.0 8363.5 12443.5 16640.5 22263.5 25163.0\n8365.0 12474.5 16671.5 22257.0\n16638.0\nW45 4195.5 6293.5 8364.0 12444.0 16641.0 22264.0 25163.5\n8365.5 12475.0 16672.0 22257.5\n16638.5\nW46 4195.0 6293.0 8364.5 12444.5 16641.5 22264.5 25164.0\n8371.0 12475.5 16672.5 22258.0\n16639.0\nW47 4194.5 6292.5 8365.0 12445.0 16642.0 22265.0 25164.5\n8371.5 12476.0 16673.0 22258.5\n16639.5\nW48 4194.0 6292.0 8365.5 12445.5 16642.5 22265.5 25165.0\n8372.0 12476.5 16673.5 22259.0\n16640.0\nW49 4193.5 6291.5 8371.0 12446.0 16643.0 22266.0 25165.5\n8372.5 12422.0 16674.0 22259.5\n16640.5\nW50 4193.0 6291.0 8371.5 12446.5 16643.5 22266.5 25166.0\n8373.0 12422.5 16674.5 22260.0\n16641.0\nW51 4192.5 6290.5 8372.0 12447.0 16644.0 22267.0 25166.5\n8373.5 12423.0 16675.0 22260.5\n16641.5\nW52 4192.0 6290.0 8372.5 12447.5 16644.5 22267.5 25167.0\n8374.0 12423.5 16675.5 22261.0\n16642.0\nW53 4191.5 6289.5 8373.0 12448.0 16645.0 22268.0 25167.5\n8374.5 12424.0 16676.0 22261.5\n16642.5\nW54 4191.0 6289.0 8373.5 12448.5 16645.5 22268.5 25168.0\n8375.0 12424.5 16676.5 22262.0\n16643.0\nW55 4190.5 6288.5 8374.0 12449.0 16646.0 22269.0 25168.5\n8375.5 12425.0 16677.0 22262.5\n16643.5\nW56 4190.0 6288.0 8374.5 12449.5 16646.5 22269.5 25169.0\n8376.0 12425.5 16677.5 22263.0\n16644.0\nW57 4189.5 6287.5 8375.0 12450.0 16647.0 22270.0 25169.5\n8342.0 12426.0 16678.0 22263.5\n16644.5\nW58 4189.0 6287.0 8375.5 12450.5 16647.5 22270.5 25170.0\n8342.5 12426.5 16678.5 22264.0\n16645.0\nW59 4188.5 6286.5 8376.0 12451.0 16648.0 22271.0 25170.5\n8343.0 12427.0 16679.0 22264.5\n16645.5\nW60 4188.0 6286.0 8342.0 12451.5 16648.5 22271.5 25171.0\n8343.5 12427.5 16679.5 22265.0\n16646.0\nW61 4187.5 6285.5 8342.5 12452.0 16649.0 22272.0 25161.5\n8344.0 12428.0 16680.0 22265.5\n16646.5\nW62 4187.0 6285.0 8343.0 12452.5 16649.5 22272.5 25162.0\n8344.5 12428.5 16680.5 22266.0\n16678.0\n(ii) If the frequencies listed in paragraph (3)(i) of this section are not adequate for communications, ship stations may use any of the non-paired narrow-band direct-printing frequencies listed in § 80.361(b) of this part for A1A or J2A radiotelegraphy.\n(b) Coast station frequencies—(1) Frequencies in the 100-27500 kHz band. The following table describes the working carrier frequencies in the 100-27500 kHz band which are assignable to coast stations located in the designated geographical areas. The exclusive maritime mobile HF bands listed in the table contained in § 80.363(a)(2) of this chapter are also available for assignment to public coast stations for A1A, J2A, J2B, or J2D radiotelegraphy following coordination with government users.\nArea Bands 1\n100-160 kHz 405-525 kHz 2 MHz 4 MHz 6 MHz 8 MHz 12 MHz 16 MHz 22 MHz\nCentral Pacific 126.15 426.00 2037.5 4247.0 6348.0 8558.0 12695.5 17016.8 22479.0\n436.00 2045.0 4274.0 6365.5 8618.0 12808.5 17026.0 22515.0\n147.85 460.00 2061.5 4228.0 6477.5 8642.0 12844.5 17088.8 22557.0\n476.0 6488.0 8445.0 13002.0 22581.5\n500.00 13033.5\n512.00\nSouth Pacific 418.00 2049.5 4238.0 6355.0 8590.0 12691.0 17064.8 22467.0\n464.00 2055.5 4283.0 6463.5 8606.0 12912.0 17088.8 22593.5\n482.00 8642.0 12993.0 17220.5\n500.00 13033.5\n512.00\nGulf of Mexico 153.00 410.00 2042.0 4256.0 6369.0 8473.0 12704.5 17117.6 22467.0\n420.00 2048.0 4274.0 6435.5 8550.0 12826.5 17170.4 22668.5\n434.00 2049.5 4310.0 6446.0 8570.0 12840.0 17172.4 22686.5\n438.00 2052.5 4322.0 6495.0 8666.0 13038.0 17230.1 22688.0\n478.00 2055.5 8445.0 13051.5\n484.00 2063.0 8453.0 12660.0\n500.00\n512.00\nGreat Lakes 482.00 4316.0 6474.0 8534.0\n500.00\n512.00\nHawaii 484.00 2052.5 4295.0 6407.5 8542.0 13029.0 16978.4 22509.0\n500.00\n512.00\nPuerto Rico 153.00 486.00 2052.5 4244.0 8457.0 12700.0\n500.00\n512.00\nNorth Atlantic 112.85 418.00 2036.0 4238.0 6351.5 8502.0 12745.5 16933.2 22485.0\n124.05 436.00 2040.5 4268.0 6376.0 8514.0 12925.5 16968.8 22503.0\n130.35 442.00 2046.5 4331.0 6414.5 8586.0 12948.0 16973.6 22521.0\n132.10 460.00 2051.0 4343.0 6418.0 8610.0 12961.5 16997.6 22599.5\n134.55 472.00 2054.0 4346.0 6333.5 8630.0 12997.5 17021.6 22640.0\n137.00 476.00 2060.0 6337.0 8658.0 13020.0 17093.6 22658.0\n482.00 6344.0 8686.0 13024.5 16904.9\n146.80 500.00 13033.5\n147.50 512.00 13060.5\nCentral Atlantic 428.00 2063.0 4346.0 6484.5 8502.0 12885.0 16916.5 22588.5\n500.00\n512.00\nSouth Atlantic 137.70 434.00 2039.0 4250.0 6389.6 8486.0 12952.5 16918.8 22503.0\n464.00 2043.5 4292.0 6407.5 8525.0 12970.5 17093.6 22575.5\n472.00 2051.0 4295.0 6411.0 8686.0 13011.0 17160.8\n488.00 2057.0 8453.0 12660.0 17170.4\n500.00 17239.7\n512.00\nNorth Pacific 482.00 2058.5 4349.0 6411.0 8582.0 12907.5 17007.2 22539.0\n488.00 2063.0 8658.0 12916.5\n500.00\n512.00\nAlaska 416.00\n438.00\n452.00\n472.00\n512.00\n1 All frequencies in this table are shown in kilohertz. The use of frequencies in the 472-479 kHz band is restricted to public coast stations that were licensed on or before July 14, 2017.\n(2) Conditions of use. The following conditions are applicable to these frequencies:\n(i) Frequencies in the 100-160 kHz band are assignable to coast stations for high seas communications only;\n(ii) Frequencies above 5 MHz may be assigned primarily to stations serving the high seas and secondarily to stations serving inland waters of the United States, including the Great Lakes, under the condition that interference will not be caused to any coast station serving the high seas.\n(iii) The frequency 410 kHz may be used on a secondary basis for the transmission of radiodetermination information and for transmitting by radiotelegraph radiodetermination messages to direction-finding stations; and","path":["Title 47—Telecommunication","CHAPTER I—FEDERAL COMMUNICATIONS COMMISSION","SUBCHAPTER D—SAFETY AND SPECIAL RADIO SERVICES","PART 80—STATIONS IN THE MARITIME SERVICES","Subpart H—Frequencies"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-47.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:28Z","sha256":"22cab67943006b9603d7666c894c35fbc17e64bc1cd3dab09e4bbc5f4b5c6467","source_id":"us-cfr","stale":true,"prev":"us/47-cfr-80.355","next":"us/47-cfr-80.359"},"notice":"GroundRules: Original legal text. Not legal advice."}