A distress signal, also known as a distress call, is an internationally recognized means for obtaining help. Distress signals are communicated by transmitting...

bright light or intense heat without an explosion. Flares are used for distress signaling, illumination, or defensive countermeasures in civilian and military...

A distress hand signal is a hand signal to indicate distress and need of rescue. At sea, the oldest hand signal to indicate distress is to flap the arms...

procedure word used internationally as a distress signal in voice-procedure radio communications. It is used to signal a life-threatening emergency primarily...

code Problems playing this file? See media help. SOS is a Morse code distress signal ( ▄ ▄ ▄ ▄▄▄ ▄▄▄ ▄▄▄ ▄ ▄ ▄ ), used internationally, originally established...

distress signal is a distress signal in the case of mountain emergency, an emergency in alpine areas. It involves repeating a sound or other signal six...

referred to as a state of "urgency". This is distinct from a mayday call (distress signal), which means that there is imminent danger to life or to the continued...

or signal pistol, is a large-bore handgun that discharges flares, blanks and smoke. The flare gun is typically used to produce a distress signal. The...

code as ▄▄▄ ▄ ▄▄▄ ▄  ▄▄▄ ▄▄▄ ▄ ▄▄▄  ▄▄▄ ▄ ▄ ) is one of the first distress signals adopted for radio use. On 7 January 1904 the Marconi International...

406 MHz distress radio signal, which is used by search-and-rescue teams to quickly locate the emergency and render aid. The distress signal is detected...

a novel by Greg Egan Distress (1946 film), a 1946 French film Distress (1929 film), a 1929 French silent film Distress signal, a recognized means for...

(personal alert safety system), also known as a distress signal unit (DSU) or ADSU (automatic distress signal unit), is a personal safety device used primarily...

The Bat-Signal is a distress signal device appearing in American comic books published by DC Comics, as a means to summon the superhero Batman. It is...

Maritime Distress Safety System (GMDSS). DSC was developed to replace a voice call in older procedures. Because a DSC signal uses a stable signal with a...

and "yes") is used as a distress signal. Also signallable on a ship's whistle using Morse code. See International Code of Signals. Historically, in a CAM...

absolutely certain it was a distress signal from the Titanic. Cottam said that he had indeed received a distress signal from the Titanic, which required...

passengers out of the lifeboat and into the sea. Distress signal Simulated Titanic distress signal, in Morse code: "SOS SOS CQD CQD – MGY WE ARE SINKING...

and signal processors capable of locating an emergency beacon anywhere on Earth transmitting on the Cospas-Sarsat frequency of 406 MHz. Distress alerts...

Mayday tree refers to the May Day festival, being unrelated to the distress signal mayday. The name for the tree was in use prior to the adoption of "mayday"...

storm approaches, and while Greg radios the Coast Guard, he picks up a distress signal from a woman pleading for help. She says that someone is killing everyone...

only monitors distress signals from emergency position indicating radio beacons (EPIRBs) that broadcast using digital 406 MHz signals. Digital 406 MHz...

and Yes) is used as a distress signal. Also signallable on a ship's whistle using Morse code. See International Code of Signals. The Z flag was also famously...

A duress code is a covert distress signal used by an individual who is being coerced by one or more hostile persons. It is used to warn others that they...

space salvage freighter, is out on a mission when it encounters a distress signal and responds to it. They come upon a spaceship graveyard orbiting a...

communication and plant defence against herbivory, functioning as a distress signal warning other plants of imminent danger and, in some instances, as...

aircraft was due to land at 03:05. It was originally reported that a distress signal from emergency devices was detected by the Egyptian military at 04:26...

felon Distress signal, a message from a person or a craft such as a ship or airliner to inform others it is in difficulty Mayday (distress signal) SOS...

three-letter codes that each start with the letter "Q". It is an operating signal initially developed for commercial radiotelegraph communication and later...

over the deck. One of the worst seas I've ever been in." However, no distress signals were sent before she sank; Captain McSorley's last (7:10 p.m.) message...

following and is referenced in other works of popular culture. In 2047, a distress signal is received from the Event Horizon, a starship that disappeared during...