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Mayday is an emergency procedure word used internationally as a distress signal in voice-procedure radio communications.. It is used to signal a life-threatening emergency primarily by aviators and mariners, but in some countries local organizations such as firefighters, police forces, and transportation organizations also use the term.
A ship flying no flags may also be understood to be in distress. [6] For one country, the Philippines, an inverted flag is a symbol of war rather than distress. [7] If any flag is available, distress may be indicated by tying a knot in it and then flying it upside-down, making it into a wheft. [8]
(See chart to the right.) Combinations of these alphanumeric characters are assigned as codes for various standardized messages. For instance, the master of a ship may wish to communicate with another ship, where their own radio may not be working or the other ship's call sign is not known or the other ship may not be maintaining a radio watch.
The origins of May Day can be confusing because May Day has a few different meanings depending on where you are in the world. On the one hand, May Day is a traditional spring festival dating back ...
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The appropriate lights may also be displayed during the day at times of restricted visibility or other necessary circumstances. [3] Vessels under 7 meters are generally not required to display day shapes even if they are required to display lights at night. [4] A square black flag displayed over the ball may be used as a distress signal. [5]
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. [1]
At the beginning of the 20th century, it became custom to give a sprig of lily of the valley, a symbol of springtime, on 1 May. The government permits individuals and workers' organisations to sell them tax-free on that single day. Nowadays, people may present loved ones either with bunches of lily of the valley or dog rose flowers. [45]