47 C.F.R. § 80.327 Urgency signals.
Title 47 - Telecommunication
(a) The urgency signal indicates that the calling station has a very urgent message to transmit concerning the safety of a ship, aircraft, or other vehicle, or the safety of a person. The urgency signal must be sent only on the authority of the master or person responsible for the mobile station. (b) In radiotelegraphy, the urgency signal consists of three repetitions of the group XXX, sent with the individual letters of each group, and the successive groups clearly separated from each other. It must be transmitted before the call. (c) In radiotelephony, the urgency signal consists of three oral repetitions of the group of words PAN PAN transmitted before the call. (d) The urgency signal has priority over all other communications except distress. All mobile and land stations which hear it must not interfere with the transmission of the message which follows the urgency signal. [51 FR 31213, Sept. 2, 1986, as amended at 52 FR 35245, Sept. 18, 1987]
Title 47: Telecommunication
PART 80—STATIONS IN THE MARITIME SERVICES
Subpart G—Safety Watch Requirements and Procedures
Distress, Alarm, Urgency and Safety Procedures
§ 80.327 Urgency signals.
