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  2. List of transponder codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Transponder_Codes

    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.

  3. Transponder (aeronautics) - Wikipedia

    en.wikipedia.org/wiki/Transponder_(aeronautics)

    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 ...

  4. Distress signal - Wikipedia

    en.wikipedia.org/wiki/Distress_signal

    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.

  5. Aircraft emergency frequency - Wikipedia

    en.wikipedia.org/wiki/Aircraft_emergency_frequency

    The aircraft emergency frequency (also known in the USA as Guard) is a frequency used on the aircraft band reserved for emergency communications for aircraft in distress.The frequencies are 121.5 MHz for civilian, also known as International Air Distress (IAD), International Aeronautical Emergency Frequency, [1] or VHF Guard, [1] and 243.0 MHz—the second harmonic of VHF guard—for military ...

  6. Multiservice tactical brevity code - Wikipedia

    en.wikipedia.org/wiki/Multiservice_tactical...

    Aircraft is out of or unable to employ active radar missiles. Skunk A radar or visual maritime surface contact whose identity is unknown. Slapshot Directive for an aircraft to employ a range-unknown high-speed anti-radiation (type/bearing) missile (HARM) against a specified threat at the specified bearing. Slide

  7. Honeywell HTF7000 - Wikipedia

    en.wikipedia.org/wiki/Honeywell_HTF7000

    The Honeywell HTF7000 is a turbofan engine produced by Honeywell Aerospace.Rated in the 6,540–7,624 lbf (29.09–33.91 kN) range, the HTF7000 is used on the Bombardier Challenger 300/350, Gulfstream G280, Embraer Legacy 500/450 and the Cessna Citation Longitude.

  8. SELCAL - Wikipedia

    en.wikipedia.org/wiki/SELCAL

    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 ...

  9. Voice warning system - Wikipedia

    en.wikipedia.org/wiki/Voice_warning_system

    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.

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