ANN's Daily Aero-Term (02.02.24): ICAO Three-Letter Designator (3LD) | Aero-News Network
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ANN's Daily Aero-Term (02.02.24): ICAO Three-Letter Designator (3LD)

Aero-Terms!

Aero-Terms are designed to be a daily reminder of the terms, names, acronyms and explanations of the unique language that populates the aviation world. Aerospace, sport aviation, fixed wing, helo, you name it... it's all fair game.

Aero-Terms should serve as a quick but intriguing reminder of the terms you may use every day, or an introduction to an aspects of the Aero-World you may not yet be familiar with. ANN also encourages readers to go beyond the FMI link, and further research any intriguing terms.

Suggestions for future Aero-Terms are ALWAYS welcome, as are additions or discussion of the explanations given for each Aero-Term.

ICAO Three-Letter Designator (3LD)

An ICAO 3LD is an exclusive designator that, when used together with a flight number, becomes the aircraft call sign and provides distinct aircraft identification to air traffic control (ATC). ICAO approves 3LDs to enhance the safety and security of the air traffic system. An ICAO 3LD may be assigned to a company, agency, or organization and is used instead of the aircraft registration number for ATC operational and security purposes. An ICAO 3LD is also used for aircraft identification in the flight plan and associated messages and can be used for domestic and international flights. A telephony associated with an ICAO 3LD is used for radio communication.

FMI: www.faa.gov

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© 2007 - 2025 Web Development & Design by Pauli Systems, LC


Debugging Information
ColdFusion Server Enterprise 2023,0,16,330828
Template /emailarticle.cfm
Time Stamp 02-Dec-25 06:05 AM
Locale English (US)
User Agent Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
Remote IP 10.0.20.1
Host Name 10.0.20.1


Execution Time

Total Time Avg Time Count Template
49 ms 49 ms 1 C:/inetpub/wwwroot/clients/aero-news.net/parsed/main.textpost.cfm
49 ms 49 ms 1 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/Application.cfc | onRequest(/emailarticle.cfm) ] from C:/inetpub/wwwroot/clients/aero-news.net/Application.cfc
30 ms 30 ms 1 C:/inetpub/wwwroot/clients/aero-news.net/model/main/actTextPost.cfm
5 ms 5 ms 1 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/Application.cfc | onRequestStart(/emailarticle.cfm) ] from C:/inetpub/wwwroot/clients/aero-news.net/Application.cfc
3 ms 3 ms 1 C:/inetpub/wwwroot/clients/aero-news.net/view/layout/dspBannerAds.cfm
2 ms 2 ms 1 C:/inetpub/wwwroot/clients/aero-news.net/model/main/actWidgets.cfm
2 ms 2 ms 1 C:/inetpub/wwwroot/clients/aero-news.net/model/main/qryTextPost.cfm
2 ms 2 ms 1 C:/inetpub/wwwroot/clients/aero-news.net/view/layout/dspWidgets.cfm
1 ms 1 ms 1 C:/inetpub/wwwroot/clients/aero-news.net/fusebox.init.cfm
1 ms 1 ms 1 C:/inetpub/wwwroot/clients/aero-news.net/model/main/qryAudio.cfm
1 ms 1 ms 1 C:/inetpub/wwwroot/clients/aero-news.net/view/comments/dspDisqus.cfm
1 ms 1 ms 1 C:/inetpub/wwwroot/clients/aero-news.net/view/display/dspTextPost.cfm
1 ms 1 ms 1 C:/inetpub/wwwroot/clients/aero-news.net/view/layout/widgets/widget_234BannerZone.cfm
1 ms 1 ms 1 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/Application.cfc | onRequestEnd(/emailarticle.cfm) ] from C:/inetpub/wwwroot/clients/aero-news.net/Application.cfc
1 ms 1 ms 1 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/fuseboxApplication.cfc | compileRequest(main.textpost, CFC: fckeditor.fb551.fusebox5.myFusebox) ] from C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/fuseboxApplication.cfc
1 ms 1 ms 1 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/fuseboxApplication.cfc | expandFuseboxPath(parsed/) ] from C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/fuseboxApplication.cfc
1 ms 1 ms 1 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/myFusebox.cfc | init(fusebox, [complex value], [complex value]) ] from C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/myFusebox.cfc
1 ms 1 ms 1 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/myFusebox.cfc | trace(Fusebox, Request completed) ] from C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/myFusebox.cfc
0 ms 0 ms 1 C:/inetpub/wwwroot/clients/aero-news.net/CustomTags/bph/QuerySim.cfm
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0 ms 0 ms 1 C:/inetpub/wwwroot/clients/aero-news.net/view/layout/widgets/widget_topvideos.cfm
0 ms 0 ms 13 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/components/utils.cfc | RandomNumber() ] from C:/inetpub/wwwroot/clients/aero-news.net/components/utils.cfc
0 ms 0 ms 1 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/components/utils.cfc | tagstripper(<h3><span style="color:rgb(255, 0, 0)"><strong><u>ICAO Three-Letter Designator (3LD)</u></strong></span></h3>

An ICAO 3LD is an exclusive designator that, when used together with a flight number, becomes the aircraft call sign and provides distinct aircraft identification to air traffic control (ATC). ICAO approves 3LDs to enhance the safety and security of the air traffic system. An ICAO 3LD may be assigned to a company, agency, or organization and is used instead of the aircraft registration number for ATC operational and security purposes. An ICAO 3LD is also used for aircraft identification in the flight plan and associated messages and can be used for domestic and international flights. A telephony associated with an ICAO 3LD is used for radio communication.

) ] from C:/inetpub/wwwroot/clients/aero-news.net/components/utils.cfc
0 ms 0 ms 1 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/fuseboxAction.cfc | getAccess() ] from C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/fuseboxAction.cfc
0 ms 0 ms 2 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/fuseboxApplication.cfc | getCoreToAppRootPath() ] from C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/fuseboxApplication.cfc
0 ms 0 ms 1 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/fuseboxApplication.cfc | getVersion() ] from C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/fuseboxApplication.cfc
0 ms 0 ms 1 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/fuseboxEvent.cfc | init([complex value], [complex value], CFC: fckeditor.fb551.fusebox5.myFusebox) ] from C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/fuseboxEvent.cfc
0 ms 0 ms 2 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/myFusebox.cfc | getMyself() ] from C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/myFusebox.cfc
0 ms 0 ms 1 CFC[ C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/myFusebox.cfc | getSelf() ] from C:/inetpub/wwwroot/clients/aero-news.net/fb551/fusebox5/myFusebox.cfc
2 ms  STARTUP, PARSING, COMPILING, LOADING, & SHUTDOWN
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red = over 250 ms average execution time


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SELECT *
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SELECT 
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NewsCategories2 (Datasource=AeroNews, Time=0ms, Records=8, Cached Query) in C:\inetpub\wwwroot\clients\aero-news.net\model\main\qryNewscats.cfm @ 06:05:38.038
SELECT 
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