Distress signals
Use of the distress signal indicates that a ship, aircraft or person requires immediate assistance. The radiotelegraphy distress signal consists of the group (SOS), transmitted as a single character. The radiotelephony distress signal consists of the word 'MAYDAY'.
Distress call and message
The distress call consists of:
a) The distress signal sent three times;
b) the words 'THIS IS' or 'DE'; and
c) the callsign or other identification of the station in distress, sent three times.
The distress message consists of:
a) the distress signal SOS (radiotelegraphy) or MAYDAY (radiotelephony);
b) the name, or other identification, of the station in distress;
c) particulars of its position;
d) the nature of the distress and the kind of assistance required; and
e) any other information which might be of assistance.
Obligation to accept distress traffic
A distress call or message has absolute priority over all other transmissions and may be heard on any frequency. Amateur radio operators should be prepared to accept such traffic at all times.
When a distress call is heard, you must:
a) immediately cease all transmissions;
b) continue to listen on the frequency; and
c) record full details of the distress message (the information should be recorded in writing and, if possible, by tape recorder).
If a distress message is received, defer acknowledgement for a short interval to see if the message has been received by a station better placed to render assistance. If the distress message is not acknowledged within a reasonable time, the amateur operator is obliged to assist.
Notifying appropriate authority
After acknowledging or attempting to acknowledge receipt of the distress message, you should immediately forward details of the distress situation to:
a) for land based distress situations - the nearest Police Station;
b) for air based distress situations, the DCA and
c) for sea based distress situations, the Coast Guard.
You should resume listening and keep the respective authority informed of any developments. Any assistance practicable should be given until cessation of distress traffic is announced (by means of the operating signals 'QUM' in radiotelegraphy or 'SEELONCE FEENEE' in radiotelephony), or until you are advised that assistance is no longer required.
Urgency signals
In cases where the use of the distress signal is not fully justified, the 'URGENCY' signal may be used. In Morse radiotelegraphy, the urgency signal consists of three repetitions of the group 'XXX' , sent with the letters of each group and the successive groups clearly separated from each other. It shall be transmitted before the call.
In radiotelephony, the urgency signal consists of the group of words 'PAN PAN' , each word of the group pronounced as the French word 'panne'. The urgency signal shall be repeated three times before the call.
The urgency signal has priority over all other transmissions except distress. All stations hearing an urgency signal should:
a) ensure that they do not cause interference to the transmission of the message that follows;
b) be prepared to assist if required.
In the event of natural disasters, normal communications systems may be overloaded, damaged, or completely disrupted, and the rapid establishment of communication to facilitate world-wide relief actions is essential. As the amateur bands are not bound by international plans or notification procedures, they are well adapted for short-term use in emergency situations. The amateur service, with its widespread distribution and demonstrated capacity to assist with the use of certain amateur frequencies, is vital in meeting this need until normal communications are restored.
Any communications shall be carried out only with the consent of the administration of the country in which the disaster has occurred. Relief communications provided from outside the country in which disaster has occurred shall not replace existing national or international amateur emergency networks. Close co-operation is desirable between amateur stations and the stations of other radio services which may find it necessary to use amateur frequencies in disaster communications. International relief communications shall avoid, as far as practicable, interference to the amateur service networks.
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