Code 4000 should be assigned when aircraft are operating on a flight plan specifying frequent or rapid changes in assigned altitude in more than one stratum or other category of flight not compatible with a discrete code assignment.
0000 — A generic code that is not assigned and should not be used. 1200 — VFR aircraft. The default code for all flights–if you aren't asked to set anything else, you should set 1200. 7500 — Hijacking. 7600 — Voice radio failure.
Code 7600 is the code for a loss of radio. If a pilot's radio goes out during a fight, they can enter 7600 into the transponder. Then they should proceed to their intended airport following a standard landing plan. Pilots should be extra careful and on alert for other aircraft around them in the sky.
Some squawk codes are reserved, such as 7700 (emergency), 7600 (communication failure), 7500 (hijacking), 1202 (glider), 1200 (VFR), etc. One of these, 7777, is apparently used for "military interception." What does this mean in the United States?
In a message from the Korean Air flight, the pilot included "HJK" in the message, a code for a hijacking. As such, the company subsequently notified NORAD of the possible situation. ATC then asked the flight to change its squawk code to 7500, the code for hijacking, as a way to check if the plane was indeed hijacked.
Squawking 7700 in an emergency
The most well know of these is the code 7700. This is used to indicate an emergency of any kind. A pilot will enter this when in an emergency situation - either instructed by ATC after declaring an emergency or without communication if there is no time.
Squawk 7000: This is the 'conspicuity code' for VFR aircraft that are not assigned a specific code by ATC. Squawk 2000: This is the 'conspicuity code' for IFR aircraft that are not assigned a specific code by ATC.
Code 7400 may be displayed 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.
7000. ICAO. VFR standard squawk code when no other code has been assigned. EASA countries. Code that pilot shall set when not receiving air traffic services, unless otherwise prescribed by the competent authority.
For example, "1200" in the USA means that the flight is flying under Visual Flight Rules (VFR) and is not typically in direct contact with ATC. "1200" is a shared code so you may see many aircraft transmitting it at the same time in a given area.
Code 1000 is telling Air Traffic Control that your craft is General Aviation Transport and can be identified by a 24 bit unique label that your transponder will send.
What does the phrase "squawk 3456" mean? Set 3456 on the SSR transponder and press the special identification button. Set 3456 on the SSR transponder. Set 3456 on the SSR transponder and press the test button to ensure the functionality of the device. Standby on frequency 345.6Mhz.
By international agreement, 2000 is used for aircraft which have not been assigned a transponder code, although in some parts of Europe, 7000 is used for this purpose.
Famous Squawk codes
The first of these is the code 7500, which signals “unlawful interference,” more commonly referred to as hijacking. This is a situation where squawking is particularly useful, as it allows the pilots to contact ATC discreetly.
VFR gliders should squawk 1202 in lieu of 1200. Gliders operate under some flight and maneuvering limitations. They may go from essentially stationary targets while climbing and thermaling to moving targets very quickly.
Three transponder codes are reserved for unusual/emergency situations: - 7700 for general emergencies. - 7600 for loss of communication (radio failure). - 7500 for hijacking or other unlawful interference.
Aircraft in an emergency, who are not receiving an air traffic service should set the transponder to EMERGENCY (Mode 3A Code 7700) as part of their initial actions. "A pilot may select Mode 3A Code 7700 whenever he has specific reason to believe that this would be the best course of action" [ ICAO Doc 8168 Vol 1.]
You might have noticed on our squawk box that the number 50 isn't available, that's because 5050 is the designated frequency monitoring code for #Southend.. A #pilot may listen to our #frequency, without communicating directly.
It also enables air traffic control to quickly render assistance to you in the event of an emergency (squawk 7700), radio failure (squawk 7600) or if you are lost (squawk 0030).
“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 7776 and Code 7777 are reserved for SSR ground transponder monitoring. Are reserved for humanitarian flights.
The F-35A declared an emergency whilst in flight.
The aircraft declared an emergency by 'squawking 7700'. This means that the pilot has determined that they have an 'urgency' or 'distress' situation and needs timely (but not necessarily immediate) assistance.
If there's a radio failure associated with an emergency, the aircraft might alternately squawk 7600 (no radio) and 7700 (emergency). This alerts ATC that the aircraft is declaring an emergency and does not have an operable radio.
Pilots are not required to file a flight plan for arrivals or departures. The aircraft must squawk code 1201 for WN35 or 1204 for 90WA to indicate the pilot's intent to arrive or depart the airport.