Quick Facts
- Type
- ATC Communication Code
- Definition
- A four-digit transponder code assigned by ATC for radar identification
- Used By
- Pilots, ATC
Definition#
A squawk (or squawk code) is a four-digit octal code set on an aircraft's transponder for radar identification by ATC. The term also refers to the act of setting or transmitting this code.
Why It Matters Operationally#
Squawk codes allow ATC to identify individual aircraft on radar. Discrete codes are assigned to IFR flights. Emergency codes (7700 general emergency, 7600 lost comms, 7500 hijack) trigger immediate alerts.