§  80.1117   Procedure for receipt and acknowledgement of distress alerts.

   (a) Normally, distress calls received using digital selective calling
   are only acknowledged using a DSC acknowledgement by a coast station.
   Ships should delay any acknowledgement in order to give sufficient time
   for a coast station to acknowledge the call. In cases where no
   acknowledgement has been heard and no distress traffic has been heard,
   the ship should transmit a distress alert relay to the coast station.
   Upon advice from the Rescue Coordination Center, the ship may transmit
   a DSC acknowledgement call to stop it from being repeated.
   Acknowledgement by digital selective calling of receipt of a distress
   alert in the terrestrial services must comply with ITU–R Recommendation
   M.541–9, “Operational Procedures for the Use of Digital
   Selective-Calling Equipment in the Maritime Mobile Service,” with
   Annexes 1 through 5, 2004. ITU–R Recommendation M.541–9 with Annexes is
   incorporated by reference. The Director of the Federal Register
   approves this incorporation by reference in accordance with 5 U.S.C.
   552(a) and 1 CFR part 51. Copies of this standard can be inspected at
   the Federal Communications Commission, 445 12th Street, SW.,
   Washington, DC (Reference Information Center) or at the National
   Archives and Records Administration (NARA). For information on the
   availability of this material at NARA, call 202–741–6030, or go to:
   http://www.archives.gov/federal_register/code_of_federal_regulations/ib
   r_locations.html . The ITU–R Recommendation can be purchased from the
   International Telecommunication Union (ITU), Place des Nations, CH–1211
   Geneva 20, Switzerland.

   (b) Acknowledgement through a satellite of receipt of a distress alert
   from a ship earth station must be sent immediately (see § 80.1119).

   (c) Acknowledgement by radiotelephony of receipt of a distress alert
   from a ship station or a ship earth station must be given in the
   following form:

   (1) The distress signal MAYDAY;

   (2) The call sign or other identification of the station sending the
   distress message, spoken three times;

   (3) The words THIS IS (or DE spoken as DELTA ECHO in case of language
   difficulties);

   (4) The call sign or other identification of the station acknowledging
   receipt, spoken three times;

   (5) The word RECEIVED (or RRR spoken as ROMEO ROMEO ROMEO in case of
   language difficulties);

   (6) The distress signal MAYDAY.

   (d) The acknowledgement by direct-printing telegraphy of receipt of a
   distress alert from a ship station must be given in the following form:

   (1) The distress signal MAYDAY;

   (2) The call sign or other identification of the station sending the
   distress alert;

   (3) The word DE;

   (4) The call sign or other identification of the station acknowledging
   receipt of the distress alert;

   (5) The signal RRR;

   (6) The distress signal MAYDAY.

   (e) The acknowledgement by direct-printing telegraphy of receipt of a
   distress alert from a ship earth station must be given by the coast
   earth station receiving the distress alert by retransmitting the ship
   station identity of the ship transmitting the distress alert.

   [ 57 FR 9065 , Mar. 16, 1992, as amended at  68 FR 46980 , Aug. 7, 2003;  73 FR 4491 , Jan. 25, 2008]