Goto Section: 80.141 | 80.143 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 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
(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
(c) Required channels for radiotelegraphy. (1) Each ship station using
telegraphy on frequencies within the band 405-525 kHz must be capable
(i) Transmit on at least two working frequencies and receive on all
other frequencies necessary for their service using authorized
(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.
Goto Section: 80.141 | 80.143
Goto Year: 2020 |
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