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The radiotelephony message PAN-PAN is the international standard urgency signal that someone aboard a boat, ship, aircraft, or other vehicle uses to declare that they need help and that the situation is urgent, [1] [2] [3] but for the time being, does not pose an immediate danger to anyone's life or to the vessel itself. [4]
The first US ship to send a wireless distress call in 1905 simply sent HELP (in both International Morse and American Morse code). [3]: 218 On 7 December 1903, Ludwig Arnson was a wireless operator aboard the liner SS Kroonland when the ship lost a propeller off the Irish coast. His call of CQD brought aid from a British cruiser.
A Mayday message consists of the word "mayday" spoken three times in succession, which is the distress signal, followed by the distress message, which should include: Name of the vessel or ship in distress; Its position (actual, last known, or estimated expressed in lat/long or in distance/bearing from a specific location)
Message precedence is an indicator attached to a message indicating its level of urgency, and used in the exchange of radiograms in radiotelegraph and radiotelephony procedures. Email header fields can also provide a precedence flag.
The asymmetric flow around a ship induced by the vicinity of banks causes pressure differences (Bernoulli's principle) between port and starboard sides.As a result, a lateral force will act on the ship, mostly directed towards the closest bank, as well as a yawing moment pushing her bow towards the centre of the waterway.
Sécurité (/ s eɪ ˈ k jʊər ɪ t eɪ /; French: sécurité) (often repeated thrice, "Sécurité, sécurité, sécurité") is a procedure word used in the maritime radio service that warns the crew that the following message is important safety information. The most common use of this is by coast radio stations before the broadcast of ...
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The pain of paying is a concept from Behavioral Economics and Behavioral Science, coined in 1996 by Ofer Zellermayer, whilst writing his PhD dissertation at the University of Carnegie Mellon, under supervision of George Loewenstein.