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VFR flight above 12,500' ASL when no other code has been assigned. [7] Japan: VFR flight above 10,000' MSL when no other code has been assigned. [citation needed] US: External ARTCC subset. (Block of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.) [3] 1500 US
Provides 2-digit 5-bit mission code (cockpit selectable) [1] 2: Provides 4-digit octal unit code (set on ground for fighters, can be changed in flight by transport aircraft) [1] 3: A: Provides a 4-digit octal identification code for the aircraft, set in the cockpit but assigned by the air traffic controller.
Phrase Word Brevity Code Phrase Word English Meaning APCO TEN CODE Use Caution Caution: dangerous condition is suspected to exist. 10-0 Unreadable Radio signal is too weak to receive. 10-1 Out of Service Unit, vehicle or person is not working 10-7 In Service Unit, vehicle or person is working but not necessarily "available" or "on radio." 10-8
The registration often denotes the aircraft type and maker. Some examples: HB-Axx two-engined aircraft from 5.7 to 15 tons, Aircraft over 15 tons due to shortage of Jxx. HB-Bxx balloons; HB-Cxx single-engined Cessnas under 5.7 tons; HB-Dxx and HB-Kxx other single-engined aircraft under 5.7 tons; HB-Fxx Swiss-produced aircraft like PC-6 and PC-12
Using the codes eases coordination and improves understanding during multiservice operations. The codes are intended for use by air, ground, sea, and space operations personnel at the tactical level. Code words that are followed by an asterisk (*) may differ in meaning from NATO usage. There is a key provided below to describe what personnel ...
The U. S. Navy's aircraft visual identification system uses tail codes and modex to visually identify the aircraft's purpose and organization. Carrier air wing (CVW) tail codes denote which fleet the air wing belongs; A for Atlantic Fleet and N for Pacific Fleet. All squadrons display their CVW's tail code as follows, regardless of aircraft type:
Designators for Aircraft Operating Agencies, Aeronautical Authorities and Services (Doc8585) Publications Purchasing (official site) ICAO Aviation Data Service (official site) Airline Designator / Code Database Search Archived 2005-10-01 at the Wayback Machine (from The Airline Codes Web Site)
Above aerodrome elevation [1] In aviation, above aerodrome level (AAL), or above aerodrome elevation (AAE), denotes that an altitude is given above the nearest aerodrome or airport. AAIB Air Accidents Investigation Branch: United Kingdom AAIM Aircraft Autonomous Integrity Monitoring AAO Assumed adverse obstacle AAS Airport advisory service [1] AC