distress signal(redirected from Distress frequency)
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An international signal used by a distressed ship or aircraft to request help.
(Nautical Terms) a signal by radio, Very light, etc from a ship or other vessel in need of immediate assistance
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|Noun||1.||distress signal - an internationally recognized signal sent out by a ship or plane indicating that help is needed|
signal, signaling, sign - any nonverbal action or gesture that encodes a message; "signals from the boat suddenly stopped"
SOS - an internationally recognized distress signal in radio code
Mayday - an internationally recognized distress signal via radiotelephone (from the French m'aider)