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SOS is a Morse code distress signal ( ), used internationally, originally established for maritime use.In formal notation SOS is written with an overscore line (SOS), to indicate that the Morse code equivalents for the individual letters of "SOS" are transmitted as an unbroken sequence of three dots / three dashes / three dots, with no spaces between the letters.
The letters SOS have been used as a code for emergency since 1905. But what does SOS mean exactly? The post What SOS Stands For and Where It Came From appeared first on Reader's Digest.
Code 3: Respond to the call using lights and sirens. Code 2: Respond to the call with emergency lights, but without sirens. Alternatively, sirens may be used if necessary, such as to make traffic yield or when going through intersections. Code 1: Respond to the call without emergency lights and sirens.
In contrast, CQD is transmitted as three distinct letters with a short gap between each, like regular text. The SOS distress code is also easier to hear as it is nine symbols long, while no other character or sign is longer than six symbols. Germany had first adopted this distress signal in regulations effective 1 April 1905.
List of initialisms, acronyms ("words made from parts of other words, pronounceable"), and other abbreviations used by the government and the military of the United States. Note that this list is intended to be specific to the United States government and military—other nations will have their own acronyms.
Call signs in the United States are identifiers assigned to radio and television stations, which are issued by the Federal Communications Commission (FCC) and, in the case of most government stations, the National Telecommunications and Information Administration (NTIA). They consist of from 3 to 9 letters and digits, with their composition ...
List of first response mnemonics. This article is a list of mnemonics and acronyms related to first responders including community first responders, emergency departments, and other first responders with either low level or no qualifications in the relevant field. This list includes the definition of each item in the mnemonic or acronym.
SAMPLE history is a mnemonic acronym to remember key questions for a person's medical assessment. The SAMPLE history is sometimes used in conjunction with vital signs ...