47 CFR 180.335 – Procedures for canceling false distress alerts.
Written by: 2/0ff John Anthony B. Dana on 24 October 2018
§ 80.335 Procedures for canceling false distress alerts.
If a distress alert is inadvertently transmitted, the following steps shall be taken to cancel
the distress alert.
(a) VHF Digital Selective Calling.
(1) Reset the equipment immediately;
(2) Immediately cancel the distress alert orally over the telephony distress traffic
channel associated with each DSC channel on which the distress alert was transmitted;
(3) Set to Channel 16; and
(4) Transmit a broadcast message to “All stations” giving the ship’s name, call sign or
registration number, and MMSI, and cancel the false distress alert.
(b) MF Digital Selective Calling.
(1) Reset the equipment immediately;
(2) Immediately cancel the distress alert orally over the telephony distress traffic
channel associated with each DSC channel on which the distress alert was transmitted;
and
(3) Tune for radiotelephony transmission on 2182 kHz; and
(4) Transmit a broadcast message to “All stations” giving the ship’s name, call sign or
registration number, and MMSI, and cancel the false distress alert.
(c) HF Digital Selective Calling;
(1) Reset the equipment immediately;
(2) Immediately cancel the distress alert orally over the telephony distress traffic
channel associated with each DSC channel on which the distress alert was transmitted;
(3) Tune for radiotelephony on the distress and safety frequency in each band in which
a false distress alert was transmitted; and
(4) Transmit a broadcast message to “All stations” giving the ship’s name, call sign or
registration number, and MMSI, and cancel the false distress alert frequency in each
band in which a false distress alert was transmitted.
(d) INMARSAT ship earth station. Immediately notify the appropriate rescue coordination
center that the alert is cancelled by sending a distress priority message by way of the
same land earth station through which the false distress alert was sent. Provide ship
name, call sign or registration number, and INMARSAT identity with the cancelled alert
message.
(e) EPIRB. If for any reason an EPIRB is activated inadvertently, immediately contact the
nearest U.S. Coast Guard unit or appropriate rescue coordination center by telephone,
radio or ship earth station and cancel the distress alert.
(f) General and other distress alerting systems. Notwithstanding paragraphs (a) through
(e) of this section, ships may use additional appropriate means available to them to
inform the nearest appropriate U.S. Coast Guard rescue coordination center that a false
distress alert has been transmitted and should be cancelled.
[ 68 FR 46968, Aug. 7, 2003, as amended at 73 FR 4485, Jan. 25, 2008]
My Sea knowledge by: 2/0 John Anthony Dana 