Sec. 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 the latest version of CCIR Recommendation 492 
that does not prevent the use of existing equipment.
    (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 and receive on 500 kHz using the authorized emissions, 
and
    (ii) Transmit on at least two working frequencies and receive on all 
other frequencies necessary for their service using authorized 
emissions, and
    (iii) 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]