There are several different types of internationally-recognized distress signals. There are pyrotechnics (flares), flags, sounds, words, gestures and electronic radio signals.
1. The following signals, used or exhibited either together or separately, indicate distress and need of assistance:
(a) a gun or other explosive signal fired at intervals of about a minute;
(b) a continuous sounding with any fog-signalling apparatus;
(c) rockets or shells, throwing red stars fired one at a time at short intervals;
(d) a signal made by radiotelegraphy or by any other signalling method consisting of the
group ...---... (SOS) in the Morse Code;
(e) a signal sent by radiotelephony consisting of the spoken word "Mayday";
(f) the International Code Signal of distress indicated by N.C.;
(g) a signal consisting of a square flag having above or below it a ball or anything
resembling a ball;
(h) flames on the vessel (as from a burning tar barrel, oil barrel, etc.);
(i) a rocket parachute flare or a hand flare showing a red light;
(j) a smoke signal giving off orange-coloured smoke;
(k) slowly and repeatedly raising and lowering arms outstretched to each side;
(l) the radiotelegraph alarm signal;
(m) the radiotelephone alarm signal;
(n) signals transmitted by emergency position-indicating radio beacons;
(o) approved signals transmitted by radiocommunication systems, including survival craft radar transponders.
(p) a piece of orange-coloured canvas with either a black square and circle or other appropriate symbol (for identification from the air);
(q) a dye marker.
The Morse code for SOS is represented as three short signals, followed by three long signals, and then three short signals again. In Morse code, this is written as "··· --- ···". The SOS signal is universally recognized as a distress call and is used in emergency situations to indicate a need for assistance.
The plural form of the word signal is signals.
Contacting is another name for the word calling.
Kiss him.
admission is one word
Aggrieve
The cast of Distress Signals - 1990 includes: Jackie Burroughs as Narrator
characteristics of pyrotechnic visual distress devices
The cast of Distress Signals - 1998 includes: Richard Lumsden as Philip Wednesday Hoyt Richards as Troy Stewart
Life Guards Responding to Distress Signals - 1904 was released on: USA: 25 April 1904
Proper procedure for using hand held visual distress signal flare
Save Our Soul
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The noun distress is an abstract noun, a word for anxiety or mental suffering, a word for an emotion. The word distress is also a verb.
Another word for brain waves is "electroencephalogram (EEG) signals".