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

Flight Training Central

MARCH 10, 2025

To segregate military training activities from aircraft operating under instrument flight rules. What is the minimum ceiling and visibility for takeoff, landing, or entering the traffic pattern of an airport in Class E airspace under visual flight rules? Have an operating transponder with altitude reporting.

Visual Flight Rules 92

Visual Flight Rules Transponder Instrument Flight Rules Ceiling 92

Flight Training Central

MARCH 18, 2024

There are different requirements if the flight is operated under Instrument Flight Rules (IFR) or Visual Flight Rules (VFR). For example, a pilot flying IFR in controlled airspace will have to file an IFR flight plan and receive an ATC clearance. It typically extends to 4,000′ AGL.

AGL 52

AGL Indicated Airspeed Clearance Transponder 52

Pilot Institute

APRIL 24, 2024

Class B airspace is also charted on VFR Sectionals and instrument flight rules (IFR) Enroute Low Altitude charts. All aircraft inside the veil must have an operating Mode C transponder and ADS-B Out. Regardless of flight rules, you must meet the equipment requirements before entering. Just fly under a shelf!

Clearance 52

Clearance Ceiling Airspace Classes Transponder 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 AIC 46/24.

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 AIC 81/22.

True Airspeed 52

True Airspeed Instrument Flight Rules Knot Air Traffic Control 52

Flight Training Central

APRIL 29, 2024

Military Operations Area Military Operation Areas (MOA) , are segments of airspace defined by vertical and lateral limits used to segregate military training activities from aircraft operating under instrument flight rules. MTR’s with segments above 1,500′ AGL are identified by a three-digit number.

Clearance 111

Clearance AGL NOTAMs Pilot 111