A recognition signal is a signal whereby 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.
War
These signals are often used to recognize friends and enemies in a war.12 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).34 The NYPD often use headbands, wristbands or colored clothing as recognition signals which are known as the "color of the day".5
See also
External links
Wikimedia Commons has media related to International Code of Signals.References
Commander-in-Chief High Sea Fleet (German navy. "German Navy Tactical Orders (Enemy Recognition Signals)". Retrieved 2009-02-18. http://www.gwpda.org/naval/gnto0400.htm ↩
"Visual signals: Military communication without words". HPRC. Retrieved 2022-02-10. https://www.hprc-online.org/social-fitness/teams-leadership/visual-signals-military-communication-without-words ↩
James, George (24 August 1994). "Police Agencies Share Rules for Recognition". New York Times. Retrieved 2008-09-17. https://query.nytimes.com/gst/fullpage.html?res=9C0DE2DB1239F937A1575BC0A962958260 ↩
Krauss, Clifford (24 August 1994). "Subway Chaos: Officer Firing at Officer". New York Times. Retrieved 2008-10-05. https://query.nytimes.com/gst/fullpage.html?res=9C04E7DC1239F937A1575BC0A962958260&sec=&spon=&pagewanted=2 ↩
Krauss, Clifford (24 August 1994). "Subway Chaos: Officer Firing at Officer". New York Times. Retrieved 2008-10-05. https://query.nytimes.com/gst/fullpage.html?res=9C04E7DC1239F937A1575BC0A962958260&sec=&spon=&pagewanted=2 ↩