Sec. 80.1133  Transmission of safety communications.

    (a) In a terrestrial system the announcement of the safety message 
must be made on one or more of the distress and safety calling 
frequencies specified in Sec. 80.1077 using digital selective calling 
techniques. A separate announcement need not be made if the message is 
to be transmitted through the maritime mobile-satellite service.
    (b) The safety signal and message must normally be transmitted on 
one or more of the distress and safety traffic frequencies specified in 
Sec. 80.1077, or via the maritime mobile satellite service or on other 
frequencies used for this purpose.
    (c) The safety signal consists of the word SECURITE. In 
radiotelephony, it is pronounced as in French.
    (d) The safety call format or the safety signal indicates that the 
calling station has an important navigational or meteorological warning 
to transmit.
    (e) In radiotelephony, the safety message must be preceded by the 
safety signal, repeated three times, and the identification of the 
transmitting station.
    (f) In narrow-band direct-printing, the safety message must be 
preceded by the safety signal and the identification of the transmitting 
station.
    (g) Error correction techniques, in accordance with CCIR 
Recommendation 625 as specified in Sec. 80.1101, must be used for safety 
messages by direct-printing telegraphy. All messages must be preceded by 
at least one carriage return, a line feed signal, a letter shift signal 
and the safetysignal SECURITE.
    (h) Safety communications by direct-printing telegraphy should be in 
the ARQ mode when communicating directly to the Coast Guard or other 
coast stations on channels which they normally guard. Other distress 
communications, including those on simplex channels provided for that 
purpose, should be in the broadcast forward error correction mode. The 
ARQ mode may subsequently be used when it is advantageous to do so.