§ 80.142   Ships using radiotelegraphy.

   (a) Calling by narrow-band direct-printing. (1) NB-DP ship stations
   must call United States public coast stations on frequencies designated
   for NB-DP operation.

   (2) Where it is known that the coast station maintains a watch on
   working frequencies for ship station NB-DP calls the ship station must
   make its initial NB-DP call on those frequencies.

   (3) Calls to a coast station or other ship station must employ the
   following format: Coast station identification number, repeated twice;
   "DE", sent once; and ship station selective call number, repeated
   twice. When the coast station does not reply to a call sent three times
   at intervals of two minutes, the calling must cease for fifteen
   minutes.

   (b) NB-DP operating procedure. The operation of NB-DP equipment in the
   maritime mobile service must be in accordance with the operating
   procedures contained in ITU-R M.492-6 (incorporated by reference, see
   § 80.7).

   (c) Required channels for radiotelegraphy. (1) Each ship station using
   telegraphy on frequencies within the band 405-525 kHz must be capable
   of:

   (i) Transmit on at least two working frequencies and receive on all
   other frequencies necessary for their service using authorized
   emissions, and

   (ii) When a radiotelegraph installation is compulsory, a fourth
   frequency within this band which is authorized specifically for
   direction finding must also be provided.

   (2) Each ship station using telegraphy on frequencies within the band
   90-160 kHz must be capable of transmitting and receiving Class A1A
   emission on the frequency 143 kHz, and on at least two additional
   working frequencies within this band except that portion between 140
   kHz and 146 kHz.

   (3) Each ship station using telegraphy and operating in the bands
   between 4000-27500 kHz must be capable of transmitting and receiving
   Class A1A or J2A emission on at least one frequency authorized for
   calling and at least two frequencies authorized for working in each of
   the bands for which facilities are provided to carry on its service.

   (4) Each ship station using telegraphy in Region 2 on frequencies
   within the band 2065-2107 kHz must be capable of transmitting and
   receiving Class A1A or J2A emission on at least one frequency in this
   band authorized for working in addition to a frequency in this hand
   authorized for calling.

   [ 51 FR 31213 , Sept. 2, 1986, as amended at  54 FR 49993 , Dec. 4, 1989;
    68 FR 46961 , Aug. 7, 2003;  69 FR 64672 , Nov. 8, 2004;  76 FR 67610 , Nov.
   2, 2011]

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