Recognition signal

<h2 id="war">War</h2>
<p>These signals are often used to recognize friends and enemies in a war.<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a><a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> For <a href="/facts/Military/kgNmLUnN">military</a> use these signals often use colored lights or the <a href="/facts/International_marine_signal_flags/hwpenuna">International marine signal flags</a>.
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<h2 id="police">Police</h2>
<p>Other uses of the signal include the police who sometimes use a recognition signal so that officers in <a href="/facts/Uniform/KkrHUkYr">uniform</a> can recognize officers in normal clothing (undercover).<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a><a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> The <a href="/facts/New_York_Police_Department/hKR106kT">NYPD</a> often use <a href="/facts/Headband/EHyhhdJJ">headbands</a>, <a href="/facts/Wristbands/4Q9hordS">wristbands</a> or colored <a href="/facts/Clothing/5J5RhkYY">clothing</a> as recognition signals which are known as the "<a href="/facts/Color_of_the_day_(police)/luPGPN5n">color of the day</a>".<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a>
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<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Communication/EGEkchsT">Communication</a></li>
<li><a href="/facts/International_Code_of_Signals/2ngz87nW">International Code of Signals</a></li>
<li><a href="/facts/Secret_handshake/T5HUqNWl">Secret handshake</a></li></ul>

<h2 id="external-links">External links</h2>

Wikimedia Commons has media related to International Code of Signals.

<ul><li><a href="http://www.tpub.com/content/aviation/14243/css/14243_95.htm">Signalman manual</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>Commander-in-Chief High Sea Fleet (German navy. "German Navy Tactical Orders (Enemy Recognition Signals)". Retrieved 2009-02-18. <a href="http://www.gwpda.org/naval/gnto0400.htm" target="_blank">http://www.gwpda.org/naval/gnto0400.htm</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>"Visual signals: Military communication without words". HPRC. Retrieved 2022-02-10. <a href="https://www.hprc-online.org/social-fitness/teams-leadership/visual-signals-military-communication-without-words" target="_blank">https://www.hprc-online.org/social-fitness/teams-leadership/visual-signals-military-communication-without-words</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
<li id="fn:3"><p>James, George (24 August 1994). "Police Agencies Share Rules for Recognition". New York Times. Retrieved 2008-09-17. <a href="https://query.nytimes.com/gst/fullpage.html?res=9C0DE2DB1239F937A1575BC0A962958260" target="_blank">https://query.nytimes.com/gst/fullpage.html?res=9C0DE2DB1239F937A1575BC0A962958260</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li>
<li id="fn:4"><p>Krauss, Clifford (24 August 1994). "Subway Chaos: Officer Firing at Officer". New York Times. Retrieved 2008-10-05. <a href="https://query.nytimes.com/gst/fullpage.html?res=9C04E7DC1239F937A1575BC0A962958260&sec=&spon=&pagewanted=2" target="_blank">https://query.nytimes.com/gst/fullpage.html?res=9C04E7DC1239F937A1575BC0A962958260&sec=&spon=&pagewanted=2</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li>
<li id="fn:5"><p>Krauss, Clifford (24 August 1994). "Subway Chaos: Officer Firing at Officer". New York Times. Retrieved 2008-10-05. <a href="https://query.nytimes.com/gst/fullpage.html?res=9C04E7DC1239F937A1575BC0A962958260&sec=&spon=&pagewanted=2" target="_blank">https://query.nytimes.com/gst/fullpage.html?res=9C04E7DC1239F937A1575BC0A962958260&sec=&spon=&pagewanted=2</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li>
</ol>

Recognition signal open-in-new

Recognition signal