A Look At The World Of Squawk Codes And Their Meanings

If you're interested in aviation, or like listening to inflight ATC communications, you've likely heard of 'squawk codes.' These are four-digit codes given by ATC to all aircraft in the airspace for communication purposes. However, squawk codes can also be used for important communications between aircraft and the ground.

This is a companion discussion topic for the original entry at https://simpleflying.com/squawk-codes/