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(VFR squawk code for airspace 5,000 feet (1,500 m) and below prior to 15 March 2007 when replaced by the international 7000 code for VFR traffic.) [5] 0022 Germany (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
The callsign is primarily administered by the United States Navy for military flight operations on the East Coast. [1] The call sign is utilized by military air traffic controllers responsible for flight operations within restricted military airspace or to direct military air craft that is transiting civilian airspace.
Military aircraft also use a dedicated UHF-AM band from 225.0 to 399.95 MHz for air-to-air and air-to-ground, including air traffic control communication. This band has a designated emergency and guard channel of 243.0 MHz. [2] [8] Radio aeronautical navigation aids use other frequencies.
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 ...
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
Air traffic control: ATCC Air traffic control centre ATCO Air traffic controller ATCT Airport traffic control tower: ATCRBS Air traffic control radar beacon system: ATCSS Air traffic control signalling system ATD Actual time of departure Equivalent to off-block time [7] ATE Advanced Technology Engine: ATF Aerodrome traffic frequency ATFM Air ...
A discrete transponder code (often called a squawk code) is assigned by air traffic controllers to identify an aircraft uniquely in a flight information region (FIR). This allows easy identification of aircraft on radar. [6] [7] Codes are made of four octal digits; the dials on a transponder read from zero to seven, inclusive. Four octal digits ...
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.