<!DOCTYPE html>
<html class="client-nojs vector-feature-night-mode-disabled vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-sticky-header-enabled" lang="en" dir="ltr"><head>
<meta charset="UTF-8">
<title>Radio code</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="canonical" href="https://en.wikipedia.org/wiki/Radio_code"> <link href="./mw/ext.cite.styles.css" rel="stylesheet" type="text/css">
<link href="./mw/skins.vector.icons.css" rel="stylesheet" type="text/css">
<link href="./mw/skins.vector.search.codex.styles.css" rel="stylesheet" type="text/css">
<link href="./mw/skins.vector.styles.css" rel="stylesheet" type="text/css">
<link href="./mw/user.styles.css" rel="stylesheet" type="text/css">
<meta name="ResourceLoaderDynamicStyles" content="">
<link rel="stylesheet" type="text/css" href="./mw/site.styles.css">
<link rel="stylesheet" type="text/css" href="./mw/noscript.css">
<link rel="stylesheet" type="text/css" href="./footer.css">
<link rel="stylesheet" type="text/css" href="./vector-2022.css">
</head>
<body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject page-Radio_code rootpage-Radio_code skin-vector-2022 action-view">
<div class="mw-page-container">
<div class="mw-page-container-inner">
<div class="mw-content-container">
<main id="content" class="mw-body">
<header class="mw-body-header vector-page-titlebar">
<h1 id="firstHeading" class="firstHeading mw-first-heading">
<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Radio code</span></span>
</h1>
</header>
<a id="top"></a>
<div id="bodyContent" class="vector-body ve-init-mw-desktopArticleTarget-targetContainer" aria-labelledby="firstHeading" data-mw-ve-target-container="">
<div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="en" dir="ltr"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p class="mw-empty-elt">
</p><p>A <b>Radio code</b> is any <a href="Code" title="Code">code</a> that is commonly used over a <a href="Telecommunication" class="mw-redirect" title="Telecommunication">telecommunication</a> system such as <a href="Morse_code" title="Morse code">Morse code</a>, <a href="Brevity_code" title="Brevity code">brevity codes</a> and <a href="Procedure_word" title="Procedure word">procedure words</a>.
</p>
<meta property="mw:PageProp/toc">
<div class="mw-heading mw-heading2"><h2 id="Brevity_code">Brevity code</h2></div>
<style data-mw-deduplicate="TemplateStyles:r1236090951">
/* start https://en.wikipedia.org/ */
.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}
/* end https://en.wikipedia.org/ */
</style><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="Brevity_code" title="Brevity code">Brevity code</a></div>
<p>Brevity codes are designed to convey complex information with a few words or codes. Specific brevity codes include:
</p>
<ul><li><a href="ACP-131" class="mw-redirect" title="ACP-131">ACP-131</a></li>
<li><a href="Aeronautical_Code_signals" title="Aeronautical Code signals">Aeronautical Code signals</a></li>
<li><a href="ARRL_Numbered_Radiogram" title="ARRL Numbered Radiogram">ARRL Numbered Radiogram</a></li>
<li><a href="Multiservice_tactical_brevity_code" class="mw-redirect" title="Multiservice tactical brevity code">Multiservice tactical brevity code</a></li>
<li><a href="Ten-code" title="Ten-code">Ten-code</a></li>
<li><a href="Phillips_Code" title="Phillips Code">Phillips Code</a></li>
<li><a href="NOTAM_Code" class="mw-redirect" title="NOTAM Code">NOTAM Code</a></li></ul>
<ul></ul>
<div class="mw-heading mw-heading3"><h3 id="Operating_signals">Operating signals</h3></div>
<p>Brevity codes that are specifically designed for use between communications operators and to support communication operations are referred to as "<a href="Operating_signals" title="Operating signals">operating signals</a>". These include:
</p>
<ul><li><a href="Prosigns_for_Morse_code" title="Prosigns for Morse code">Prosigns for Morse code</a></li>
<li><a href="92_Code" class="mw-redirect" title="92 Code">92 Code</a>, Western Union telegraph brevity codes</li>
<li><a href="Q_code" title="Q code">Q code</a>, initially developed for commercial radiotelegraph communication, later adopted by other radio services, especially amateur radio. Used since circa 1909.</li>
<li><a href="QN_Signals" title="QN Signals">QN Signals</a>, published by the ARRL and used by <a href="Amateur_radio" title="Amateur radio">Amateur radio</a> operators to assist in the transmission of <a href="ARRL_Radiogram" title="ARRL Radiogram">ARRL Radiograms</a> in the <a href="National_Traffic_System" title="National Traffic System">National Traffic System</a>.</li>
<li>R and S brevity codes, published by the British Post Office in 1908 for coastal wireless stations and ships, superseded in 1912 by Q codes<sup id="cite_ref-pre-1912_1-0" class="reference"><a href="#cite_note-pre-1912-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></li>
<li>X code, used by European military services as a wireless telegraphy code in the 1930s and 1940s</li>
<li><a href="Z_code" title="Z code">Z code</a>, also used in the early days of radiotelegraph communication.</li></ul>
<div class="mw-heading mw-heading2"><h2 id="Other">Other</h2></div>
<p><a href="Morse_code" title="Morse code">Morse code</a>, is commonly used in Amateur radio. <a href="Morse_code_abbreviations" title="Morse code abbreviations">Morse code abbreviations</a> are a type of brevity code. <a href="Procedure_word" title="Procedure word">Procedure words</a> used in <a href="Radiotelephony_procedure" title="Radiotelephony procedure">radiotelephony procedure</a>, are a type of radio code. <a href="Spelling_alphabet" title="Spelling alphabet">Spelling alphabets</a>, including the <a href="ICAO_spelling_alphabet" class="mw-redirect" title="ICAO spelling alphabet">ICAO spelling alphabet</a>, are commonly used in communication over radios and telephones.
</p>
<div class="mw-heading mw-heading2"><h2 id="Other_meanings">Other meanings</h2></div>
<p>Many car audio systems (car radios) have a so-called 'radio code' number which needs to be entered after a power disconnection. This was introduced as a measure to deter theft of these devices. If the code is entered correctly, the radio is activated for use. Entering the code incorrectly several times in a row will cause a temporary or permanent lockout. Some car radios have another check which operates in conjunction with car electronics. If the <a href="VIN" class="mw-redirect" title="VIN">VIN</a> or another vehicle ID matches the previously stored one, the radio is activated. If the radio cannot verify the vehicle, it is considered to be moved into another vehicle. The radio will then request for the code number or simply refuse to operate and display an error message such as "CANCHECK" or "SECURE".
</p>
<div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div>
<ul><li><a href="Encoding" class="mw-redirect" title="Encoding">Encoding</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
<style data-mw-deduplicate="TemplateStyles:r1239543626">
/* start https://en.wikipedia.org/ */
.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}
/* end https://en.wikipedia.org/ */
</style><div class="reflist">
<div class="mw-references-wrap"><ol class="references">
<li id="cite_note-pre-1912-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-pre-1912_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">
/* start https://en.wikipedia.org/ */
.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("./mw/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("./mw/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("./mw/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("./mw/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}
/* end https://en.wikipedia.org/ */
</style><cite id="CITEREFAnderson2002" class="citation web cs1">Anderson, Scott (31 July 2002). <a rel="nofollow" class="external text" href="https://ac6v.com/rcode.php">"Pre-1912 Brevity Codes"</a>.</cite></span>
</li>
</ol></div></div></div><!--htdig_noindex--><div><div class="zim-footer">
This article is issued from <a class="external text" title="Last edited on 2024-03-20" href="https://en.wikipedia.org/wiki/?title=Radio_code&oldid=1214621214">Wikipedia</a>. The text is available under <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-Share Alike 4.0</a> unless otherwise noted. Additional terms may apply for the media files.
</div>
</div><!--/htdig_noindex--></div>
</div>
</main>
</div>
</div>
</div>
</body></html>