Listening squawks

A listening squawk enables an air traffic controller to alert a pilot if their aircraft looks likely to infringe.Check which listening squawks and frequencies you will need before you take your next flight.

  • Turn on your transponder and select the listening squawk, using ALT (Mode C) if you have it
  • Tune in to the frequency without transmitting
  • Listen out for your callsign or position

Air traffic control will know that you are listening out and can call you on the frequency if you are getting too close to controlled airspace.

Don’t forget to change the transponder code back to 7000 when you leave the area or change frequency.

Useful resources

Listening squawks and LARS – UPDATED June 2018

The updated card is available to download here:



Keep reading

Frequency monitoring codes – squawk cards

Learn more

Infringement avoidance

Learn more

Pre-flight planning

Learn more