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Non-discrete mode A code reserved use in mode S radar/ADS-B environment where the aircraft identification will be used to correlate the flight plan instead of the mode A code. [1] US: Used exclusively by ADS-B aircraft to inhibit mode 3A transmission. [3] US: Non-discrete code assignments in accordance with FAA Order JO 7110.65, 5-2.
This is often used by the controller to locate the aircraft amongst others by requesting the ident function from the pilot, e.g., "Cessna 123AB, squawk 0363 and ident". [ 6 ] [ 7 ] Ident can also be used in case of a reported or suspected radio failure to determine if the failure is only one way and whether the pilot can still transmit or ...
The civilian aircraft frequency for voice distress alerting is 121.5 MHz. Military aircraft use 243 MHz (which is a harmonic of 121.5 MHz, and therefore civilian beacons transmit on this frequency as well). Aircraft can also signal an emergency by setting one of several special transponder codes, such as 7700.
An aircraft identified as enemy, in accordance with theater ID criteria. The term does not necessarily imply direction or authority to engage. Banzai Information/directive to execute launch and decide tactics. Base (number) Reference number used to indicate such information as headings, altitude, and fuels. Bassett Rocket-thrown ASW torpedo ...
Aircraft crashes with a high number of ground fatalities typically occur in areas where there are large congregations of people, such as buildings, marketplaces, neighborhoods, and sporting events. As of 27 February 2025, 65 accidents and incidents have resulted in at least twelve ground fatalities, fourteen at least 50 ground fatalities, and ...
This list is only of aircraft that have an article, indexed by aircraft registration "tail number" (civil registration or military serial number). The list includes aircraft that are notable either as an individual aircraft or have been involved in a notable accident or incident or are linked to a person notable enough to have a stand-alone Wikipedia article.
This information includes the call sign of the aircraft and/or the aircraft's permanent ICAO 24-bit address (which is represented for human interface purposes as six hexadecimal characters.) One of the hidden features of Mode S transponders is that they are backwards compatible; an aircraft equipped with a Mode S transponder can still be used ...
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