Commonwealth Numbered Regulations

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1988 NO. 158 CIVIL AVIATION REGULATIONS - REG 194

Safety signal
194. (1) The safety signal shall be transmitted when an aircraft wishes to
transmit a message concerning the safety of navigation or to give important
meteorological warnings.

(2) The safety signal shall be sent before the call and:

   (a)  in the case of radiotelegraphy shall consist of 3 repetitions of the
        group TTT (- - -), sent with the letters of each group and the
        successive groups clearly separated from each other; and
(b) in the case of radiotelephony shall consist of the word "SECURITY",
repeated 3 times. 


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