Sec. 80.225  Requirements for selective calling equipment.

    This section specifies the requirements for voluntary digital 
selective calling (DSC) equipment and selective calling equipment 
installed in ship and coast stations. Reference to any CCIR 
Recommendation in this section is to the most recent CCIR approved 
Recommendation that does not prevent the use of existing equipment.
    (a) DSC equipment voluntarily installed in coast or ship stations 
must meet either the requirements of CCIR Recommendation 493 (including 
only equipment classes A, B, D, and E) or RTCM Paper 56-95/SC101-STD. 
DSC equipment must not be used with the sensors referred to in 
Sec. 80.179(e)(2). DSC equipment used on compulsorily fitted ships must 
meet the requirements contained in subpart W for GMDSS.
    (b) Manufacturers of Class C DSC equipment to be used on United 
States vessels must affix a clearly discernible permanent plate or label 
visible from the operating controls containing the following:

    Warning. This equipment is designed to generate a digital maritime 
distress and safety signal to facilitate search and rescue. To be 
effective as a safety device, this equipment must be used only within 
communication range of a shore-based VHF marine channel 70 distress and 
safety watch system. The range of the signal may vary but under normal 
conditions should be approximately 20 nautical miles.

    (c) Selective calling equipment, other than that designed in 
accordance with paragraph (a) of this section, is authorized as follows:

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    (1) Equipment used in conjunction with the Automated Maritime 
Telecommunications System (AMTS) in the band 216-220 MHz,
    (2) Equipment used to perform a selective calling function during 
narrow-band direct-printing (NB-DP) operations in accordance with CCIR 
Recommendation 476 or 625, and
    (3) Equipment functioning under the provisions of Sec. 80.207(a) 
includes the brief use of radiotelegraphy, including keying only the 
modulating audio frequency, tone signals, and other signalling devices 
to establish or maintain communications provided that:
    (i) These signalling techniques are not used on frequencies 
designated for general purpose digital selective calling (DSC) and 
distress and safety DSC calling as listed in Sec. 80.359;
    (ii) The authorized radiotelephone emission bandwidth is not 
exceeded;
    (iii) Documentation of selective calling protocols must be available 
to the general public; and,
    (iv) Harmful interference is not caused to stations operating in 
accordance with the International Radio Regulations.
[ 54 FR 10009 , Mar. 9, 1989, as amended at  62 FR 40306 , July 28, 1997]