Transponder

Definitions

• The airborne portion of the secondary surveillance radar system. The transponder emits a reply when queried by a radar facility.
• The airborne portion of the ATC radar beacon system.

References

• Airplane Flying Handbook, Federal Aviation Administration, 2021
• Instrument Flying Handbook, Federal Aviation Administration, 2014
• Powered Parachute Flying Handbook, Federal Aviation Administration, 2007
• Weight-Shift Control Aircraft Flying Handbook, Federal Aviation Administration, 2008