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FLARM is a proprietary electronic system used to selectively alert pilots to potential collisions between aircraft. It is not formally an implementation of ADS-B, as it is optimized for the specific needs of light aircraft, not for long-range communication or ATC interaction. FLARM is a portmanteau of "flight" and "alarm".
The code is received by any aircraft receiver monitoring the radio frequency on which the SELCAL code is broadcast. A SELCAL decoder is connected to each aircraft's radio receiver. When a SELCAL decoder on an aircraft receives a signal containing its own assigned SELCAL code, it alerts the aircraft's crew by sounding a chime, activating a light ...
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]
Survival radio operating on 243 and 282.8 MHz AM, with beacon mode, and a tone generator to allow the sending of Morse Code. Replaced by AN/PRC-149: AN/PRC-103: Survival radio: AN/PRC-104: USMC Manpack Radio: Hughes Aircraft (now Raytheon) AN/PRC-112: Survival radio, operates in Very High Frequency (VHF) and Ultra high frequency (UHF) aircraft ...
A traffic alert and collision avoidance system (TCAS), pronounced / ˈ t iː k æ s / TEE-kas), also known as an Airborne Collision Avoidance System (ACAS), [1] is an aircraft collision avoidance system designed to reduce the incidence of mid-air collision (MAC) between aircraft.
Selcall (selective calling) is a type of squelch protocol used in radio communications systems, in which transmissions include a brief burst of sequential audio tones. . Receivers that are set to respond to the transmitted tone sequence will open their squelch, while others will remain
Authorization of Aircraft Network Security Program ANT Antenna (radio) ANSOG Airport Network Security Operator Guidance A/O Air oil In turbine engines AOA Angle of attack: AOC 1: Air operator's certificate: AOC 2: Aeronautical operational control: AOG Aircraft on ground: AOM 1: Aircraft operations manual AOM 2: Airport/aerodrome operating ...
Responding on a different frequency has several practical advantages, most notably that the response from one IFF cannot trigger another IFF on another aircraft. But it requires a complete transmitter for the responder side of the circuitry, in contrast to the greatly simplified regenerative system used in the British designs.