47 CFR 80.324 - Transmission of distress message by station not itself in distress.
(a) A mobile station or a land station which learns that a mobile station is in distress must transmit a distress message in any of the following cases:
(2) When the master or person responsible for the ship, aircraft, or other vehicle not in distress, or for the land station, believes that further help is necessary.
(3) When, although not in a position to assist, it has heard a distress message which has not been acknowledged. When a mobile station transmits such a distress message, it must notify the authorities who may be able to assist.
(b) Transmission must be made on the international distress frequencies or on any other available frequency on which attention might be attracted.
(c) Transmission of the distress message must always be preceded by the call indicated below, which must itself be preceded whenever possible by the radiotelegraph or radiotelephone alarm signal. This call consists of:
Title 47 published on 2013-10-01
no entries appear in the Federal Register after this date.