Pilot Institute

FEBRUARY 28, 2025

Pilots and ATCs daily use transponder codes, also known as squawk codes. Lets examine the key transponder codes, what they mean, and how useful they can be when used correctly. Lets examine the key transponder codes, what they mean, and how useful they can be when used correctly. What Are Transponder Codes?

Transponder 52

Transponder Air Traffic Control Visual Flight Rules True Airspeed 52

Universal Weather

JANUARY 24, 2025

be equipped with an appropriate transponder with ADS-B Out capabilities that performs to the Minimum Operational Performance Standards of RTCA DO-260B, or newer; and have antenna capability for broadcast toward both ground-based as well as space-based ADS-B receivers. For more information, see AIP ENR 1.6.3.

True Airspeed 59

True Airspeed Instrument Flight Rules Knot Air Traffic Control 59

Universal Weather

APRIL 9, 2024

be equipped with an appropriate transponder with ADS-B Out capabilities that performs to the Minimum Operational Performance Standards of RTCA DO-260B, or newer; and have antenna capability for broadcast toward both ground-based as well as space-based ADS-B receivers. For more information, see AIP ENR 1.6.3.

True Airspeed 52

True Airspeed Instrument Flight Rules Knot Air Traffic Control 52