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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 ...
Airband or aircraft band is the name for a group of frequencies in the VHF radio spectrum allocated to radio communication in civil aviation, sometimes also referred to as VHF, or phonetically as "Victor". Different sections of the band are used for radionavigational aids and air traffic control. [1] [2] [3]
GIANT KILLER is a military Air Traffic Control (ATC) call sign used within certain regions of the contiguous United States (CONUS). The callsign is primarily administered by the United States Navy for military flight operations on the East Coast.
Its frequency range is extended and includes the following bands: VHF 30-88 MHz close air support; VHF 108-118 MHz navigation; VHF 118-137 MHz air traffic control; VHF 137-156 MHz land mobile; VHF 156-174 MHz maritime; UHF 225-512 MHz military/homeland defense; UHF 806-824, 851-869, 869-902, 935-941 MHz public safety bands
The High Frequency Global Communications System (HFGCS) is a network of single sideband shortwave transmitters of the United States Air Force which is used to communicate with aircraft in flight, ground stations and some United States Navy surface assets.
(VFR squawk code for airspace above 5,000 feet (1,500 m) – prior to 15 March 2007 when replaced by the international 7000 code for VFR traffic.) [5] 0025 Germany: Parachute dropping in progress. [citation needed] 0033 UK: Parachute dropping in progress. [2] 0041–0057 Belgium: Assigned for VFR traffic under Flight Information Services (BXL FIC).
Single Channel Ground Air Radio System with Enhanced SINCGARS Improvement Program (ESIP), 30-88 MHz, FM, frequency hopping and single frequency; HAVE QUICK II military aircraft radio, 225-400 MHz, AM, frequency hopping; UHF SATCOM, 225-400 MHz, MIL-STD-188-181, -182, -183 and -184 protocols
In fact, the difference between the two is subtle. While RCOs serve flight service stations, RTRs serve terminal air traffic control facilities. RCOs and RTRs may be UHF or VHF and are divided into a variety of classes determined by the number of transmitters or receivers. Classes A through G are used mainly for air/ground communications.