47 C.F.R. § 80.329 Safety signals.
Title 47 - Telecommunication
(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 (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. [51 FR 31213, Sept. 2, 1986, as amended at 69 FR 64674, Nov. 8, 2004]
Title 47: Telecommunication
PART 80—STATIONS IN THE MARITIME SERVICES
Subpart G—Safety Watch Requirements and Procedures
Distress, Alarm, Urgency and Safety Procedures
§ 80.329 Safety signals.
