What happens if a plane squawks 7700?

A Squawk 7700 indicates an emergency. This can be an emergency of any kind. Pilots may input it into the transponder themselves – or when instructed to do so by ATC. As a result, ground control will know that the aircraft is dealing with a serious issue and needs help.



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Reserved codes are used in particular situations when an aircraft wants to communicate something to ATC urgently. The most well know of these is the code 7700. This is used to indicate an emergency of any kind.

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A Squawk 7700 indicates an emergency. This can be an emergency of any kind. Pilots may input it into the transponder themselves – or when instructed to do so by ATC. As a result, ground control will know that the aircraft is dealing with a serious issue and needs help.

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Squawking 7500 signifies an aircraft being hijacked and could result in an aircraft being escorted by military forces.

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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?

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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.

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The 3 Must-Know Aircraft Emergency Squawk Codes For Pilots
  • 7700 – Distress or Urgency Condition. Before we begin discussing emergencies, let's define our terms as listed in the Pilot/Controller Glossary. ...
  • 7600 – Two-Way Radio Communication Failure (NORDO) ...
  • 7500 – Air Piracy (Hijacking or Hostile Acts Onboard)


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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.

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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.

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As of 2009, the Cospas-Sarsat system terminated monitoring and reception of the 121.5 MHz and 243.0 MHz frequencies.

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During those days, the word liftoff was used. In more recent books, rotation became the standard term, essentially replacing liftoff. The terminology used by pilots is consistent, and it is explicitly chosen so that it will not cause any possible confusion with any other term used in the industry.

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Even if no one hears you on your radio or your radio isn't functioning properly, your transponder says it all with that code. They are listening and they clear the airspace. Light signals if radios don't work. Squawking 7700 is part of an emergency checklist.

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Squawk 1000 is a code assigned by air traffic control to indicate that an aircraft is experiencing an emergency.

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