distress signal

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distress signal

[də′stres ‚sig·nəl]
(communications)
An international signal used when a ship, aircraft, or other vehicle is threatened by grave and imminent danger and requests immediate assistance; examples are special radiotelegraph and radiotelephone signals or special signal flags or flares.

distress signal

A signal transmitted by an aircraft in distress. It could be transmitted on radio as Mayday or by light indications.
References in periodicals archive ?
A spokesperson for Holyhead Coastguard said: "We received a distress call at 10.
The report said that it was only three minutes later that the ship's crew made a distress call to maritime officials - a revelation that is likely to add more questions about the lack of action from the crew even as they are facing staunch criticism for being irresponsible.
The toucan kept emitting the loud distress call but gradually decreased its intensity until it was finally dead.
The Australian Maritime Safety Authority (AMSA) had passed on details of the distress call to BASARNAS at about 1.
The boat made three distress calls about 100 nautical miles north of Australia s remote Christmas Island territory on Tuesday night and after arriving at the scene HMAS Childers sailors boarded the vessel.
30: PANIC as Titanic sends distress call "We are sinking fast and cannot last much longer".
The crew made a distress call to the Coast Guard at around 6am, but it was cut off and all radio contact was lost.
I question the reason behind Al Wefaq sending a distress call to the UN and I need to know from who they want the country to be rescued from," said Ms Salman.
The rescue operation was launched after the police operations room received a distress call from the ship's crew.
The ship put out a distress call Saturday, which was the first the EU naval force knew it was in the area The ship had not notified the EU naval force of its passage.
An ambulance responded to the distress call and birthed the child right there at the stop light.
USS VELLA GULF, At Sea -- The guided missile cruiser USS Vella Gulf (CG-72) intercepted and apprehended nine suspected pirates today in the Gulf of Aden after responding to a distress call from a nearby merchant vessel.