Recognition signal
A recognition signal is a signal where a person, a ship, an airplane or something else is recognized. They can be used during war or can be used to help the police recognize each other during undercover operations. It can also be used in biology to signal that a molecule or chemical is to be bound to another molecule.
War
These signals are often used to recognize friends and enemies in a war. For military use these signals often use colored lights or the International marine signal flags
Police
Other uses of the signal include the police who sometimes use a recognition signal so that officers in uniform can recognize officers in normal clothing (undercover). The NYPD often use headbands, wristbands or colored clothing as recognition signals which are known as the "color of the day".
Biology
A recognition signal is also a chemical signal used in biology to signal the end of a section of DNA or RNA during gene duplication in cells.
See also
Signal (Kanon Wakeshima song)
"Signal" is the fourth single released by Japanese singer and cellist Kanon Wakeshima, and second single from her album, Tsukinami. The song "Signal" was used as the ending of the anime TV series Strike the Blood. The song reached #54 on the Oricon Singles Chart and stayed on the chart for two weeks.
Track listing
Personnel
References
Signal (novel)
Signal is a 2009 children's science fiction novel by Cynthia DeFelice. The book was a Junior Library Guild selection for 2009. The novel is about a boy who is bored with his new life in upstate New York and discovers a girl who claims to be from another planet, who has been kidnapped by an abusive couple, and attempts to make a signal to contact her home planet.
Synopsis
Podcasts:
