2000: Uncontrolled IFR transponder code used when entering a secondary surveillance radar (SSR) area from a non-SSR area. 7000: Standard VFR transponder code to be used when no other code has been assigned. 7500: Aircraft hijacking.
Military aircraft operating in restricted/warning areas or on VR routes will squawk 4000 unless another code has been assigned or coordinated with ATC.
Famous Squawk codesThese special codes are standardized by the International Civil Aviation Organization (ICAO), so seeing an emergency code in Denver means the same thing as seeing the code in Delhi. The first of these is the code 7500, which signals “unlawful interference,” more commonly referred to as hijacking.
“Squawk 1234” means to just dial 1234 into your transponder. The ATC radar will show the controller that number in the tag associated with your plane. If the tell you, “squawk 1244 and ident”, you should put in the code first, and then press and release the Ident (or ID) button on the transponder.
Code 7400 may be transmitted by unmanned aircraft systems (UAS) when the control link between the aircraft and the pilot is lost. Lost link procedures are programmed into the flight management system and associated with the flight plan being flown.
Visual flight rules (VFR) flight standard squawk code used in North American airspace when no other has been assigned or is applicable. 1201. US. Assigned via FAR 93.95 for use by VFR aircraft in the immediate vicinity of LAX. US.
This notice assigns Code 1202 for use by gliders not in contact with an air traffic control (ATC) facility. The notice also provides general flight characteristics of gliders and some of their limitations.
If the 7500 squawk code is mistakenly selected, the pilot will immediately receive a call from air traffic control asking for confirmation. At this point, the pilot in command or the first officer is able to inform the transponder code has been used by mistake, and that there is no hijacked aircraft.
1200 is a shared code so you may see many aircraft transmitting it at the same time in a given area.In other parts of the world such as Europe, 7000 is used for VFR flights. The most widely recognized squawk codes are the 3 codes which indicate emergency situations.