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0041–0057. Belgium. Assigned for VFR traffic under Flight Information Services (BXL FIC). [citation needed] 0100. Australia. Flights operating at aerodromes (in lieu of codes 1200, 2000 or 3000 when assigned by ATC or noted in the Enroute Supplement). [6] 0100–0400.
The T-72 is a family of Soviet main battle tanks that entered production in 1971. [9] The T-72 was a development based on the T-64 using thought and design of the previous Object 167M. [10] [11] About 25,000 T-72 tanks have been built, and refurbishment has enabled many to remain in service for decades.
Identification, friend or foe ( IFF) is a combat identification system designed for command and control. It uses a transponder that listens for an interrogation signal and then sends a response that identifies the broadcaster. IFF systems usually use radar frequencies, but other electromagnetic frequencies, radio or infrared, may be used. [1]
TR-125 – Romanian prototype tank based on T-72 with extra armour, new FCS, new gun, modified suspension and more powerful diesel engine. A reverse engineered vehicle, it was larger in dimensions than the T-72. Its name stands for Tanc Românesc 125 ("Romanian Tank 125"), with "125" indicating the gun caliber of 125 mm.
A transponder (short for trans mitter-res ponder [1] and sometimes abbreviated to XPDR, [2] XPNDR, [3] TPDR [4] or TP [5]) is an electronic device that produces a response when it receives a radio-frequency interrogation. Aircraft have transponders to assist in identifying them on air traffic control radar. Collision avoidance systems have been ...
Transponder in a private aircraft squawking 2000. Secondary surveillance radar ( SSR) [1] is a radar system used in air traffic control (ATC), that unlike primary radar systems that measure the bearing and distance of targets using the detected reflections of radio signals, relies on targets equipped with a radar transponder, that reply to each ...
The T-54 and T-55 tanks are a series of Soviet main battle tanks introduced in the years following the Second World War. The first T-54 prototype was completed at Nizhny Tagil by the end of 1945. [3] From the late 1950s, the T-54 eventually became the main tank for armoured units of the Soviet Army, armies of the Warsaw Pact countries, and many ...
The transponder has a small required set of controls and is simple to operate. It has a method to enter the four-digit transponder code, also known as a beacon code or squawk code, and a control to transmit an ident, which is done at the controller's request (see SPI pulse below). Transponders typically have 4 operating modes: Off, Standby, On ...