Sec. 80.329  Safety signals.

    (a) The safety signal indicates that the station is about to 
transmit a message concerning the safety of navigation or giving 
important meteorological warnings.
    (b) In radiotelegraphy, the safety signal consists of three 
repetitions of the group TTT, sent with the individual letters of each 
group, and the successive groups clearly separated from each other. It 
must be sent before the call.
    (c) In radiotelephony, the safety signal consists of the word 
SECURITE, pronounced as in French, spoken three times and transmitted 
before the call.
    (d) The safety signal and call must be sent on one of the 
international distress frequencies (500 kHz or 8364 kHz radiotelegraph; 
2182 kHz or 156.8 MHz radiotelephone). Stations which cannot transmit on 
a distress frequency may use any other available frequency on which 
attention might be attracted.

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