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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.
When ground-based radar equipment [9] receives the IDENT bit, it results in the aircraft's blip "blossoming" on the radar scope. 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]
In international aviation, SELCAL or SelCal is a selective-calling radio system that can alert an aircraft's crew that a ground radio station wishes to communicate with the aircraft. SELCAL uses a ground-based encoder and radio transmitter to broadcast an audio signal that is picked up by a decoder and radio receiver on an aircraft. The use of ...
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.
Aircraft carrier optical landing system. Bandit 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 ...
The Global for Helicopters service began in October 2023 and allows helicopter flights to be tracked. FlightAware Global for Helicopters uses an ADS-B transponder, which is already part of the aircraft. If the aircraft is operating with a 1090 MHz transponder, Aireon's ADS-B space-based receivers can track them.
Aircraft carry ADS-B transponders, which transmit information such as the aircraft ID, GPS position, and altitude as radio signals. These radio transmission are collected by civilian ADS-B receivers located in the vicinity of the aircraft. These ADS-B receivers are only able to collect information on flights within radio-range of their position ...
A voice warning system is a system designed to alert the crew of an aircraft to imminent safety hazards. It is often known as a Bitchin' Betty, a slang term used by some pilots and aircrew and submariners (mainly North American). The enunciating voice, in at least some aircraft systems, may be either male or female.