§ 80.355   Distress, urgency, safety, call and reply Morse code frequencies.

   This section describes the distress, urgency, safety, call and reply
   carrier frequencies assignable to stations for Morse code
   radiotelegraphy.

   (a) Frequencies in the 100-160 kHz band. The international calling
   frequency in the 100-160 kHz band is 143 kHz using A1A or J2A emission.
   When a ship station operating in the 100-160 kHz band desires to
   communicate with a coast station, it must call on the frequency 143 kHz
   unless the International List of Coast Stations provides otherwise.
   Coast stations must reply on their normal working frequency in this
   band. Only individual calls, replies to such calls, and transmission of
   signals preparatory to traffic may be transmitted on 143 kHz.

   (b) Frequencies in the 2000-27500 kHz band—(1) Ship station
   frequencies. The following table describes the calling frequencies in
   the 4000-27500 kHz band which are available for use by authorized ship
   stations equipped with crystal-controlled oscillators for A1A, J2A,
   J2B, or J2D radiotelegraphy. There are two series of frequencies for
   worldwide use and two series of frequencies for each geographic region.
   Ship stations with synthesized transmitters may operate on every full
   100 Hz increment in the 0.5 kHz channel for the frequencies listed,
   except for 100 Hz above and below those designated for worldwide use.
   During normal business hours when not communicating on other
   frequencies, all U.S. coast radiotelegraph stations must monitor the
   worldwide frequencies and the initial calling frequencies for the
   region in which it is located. The specific frequencies which must be
   monitored by a coast station will vary with propagation conditions. The
   calling frequencies which are routinely monitored by specific coast
   stations can be determined by reference to the ITU publication entitled
   “List of Coast Stations.” Initial calls by ship stations must be made
   on the appropriate initial calling frequency first. Calls on the
   worldwide frequencies may be made only after calls on the appropriate
   initial calling frequency are unsuccessful.

   Ship Morse Calling Frequencies (kHz)
                ITU                                              ITU
   Region:
   Worldwide      3 4184.0 6276.0 8368.0 12552.0 16736.0 22280.5  C  25172.0
                  4 4184.5 6276.5 8369.0 12553.5 16738.0 22281.0  C  25172.0
   Atlantic:
   Initial        1 4182.0 6277.0 8366.0 12550.0 16734.0 22279.5  A  25171.5
   Alternate      2 4182.5 6277.5 8366.5 12550.5 16734.5 22280.0  A  25171.5
   Caribbean:
   Initial        1 4182.0 6277.0 8366.0 12550.0 16734.0 22279.5  A  25171.5
   Alternate      2 4182.5 6277.5 8366.5 12550.5 16734.5 22280.0  A  25171.5
   Gulf-Mexico:
   Initial        5 4183.0 6278.0 8367.0 12551.0 16735.0 22281.5  A  25171.5
   Alternate      6 4183.5 6278.5 8367.5 12551.5 16735.5 22282.0  A  25171.5
   N Pacific:
   Initial        7 4185.0 6279.0 8368.5 12552.5 16736.5 22282.5  B  25172.5
   Alternate      8 4185.5 6279.5 8369.5 12553.0 16737.0 22283.0  B  25172.5
   S Pacific:
   Initial        9 4186.0 6280.0 8370.0 12554.0 16737.5 22283.5  B  25172.5
   Alternate     10 4186.5 6280.5 8370.5 12554.5 16738.5 22284.0  B   25172.5

   (2) Coast Station frequencies. Coast stations may use any working
   carrier frequency for distress, safety and calling listed in
   § 80.357(b)(1) which is not identified with a specific use.

   (c) Frequencies in the VHF bands. (1) Survival craft stations using
   121.500 MHz may be assigned A3N emission for radiobeacon purposes.

   (2) EPIRB stations may be assigned 121.500 MHz and 243 MHz using A3E,
   A3X and NON emission or 406.0-406.1 MHz using G1D emission to aid
   search and rescue operations. See subpart V of this part.

   [ 51 FR 31213 , Sept. 2, 1986;  51 FR 34984 , Oct. 1, 1986;  52 FR 35245 ,
   Sept. 18, 1987;  56 FR 9886 , Mar. 8, 1991;  56 FR 11516 , Mar. 19, 1991;
    68 FR 46969 , Aug. 7, 2003;  69 FR 64674 , Nov. 8, 2004]

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