Instrument Rating Checkride Practice Test

A Mode C transponder is required in specific airspace to enhance safety and communication with Air Traffic Control. In particular, it must be operational in Class A, B, and C airspace.

Class A airspace typically requires a Mode C transponder because it is primarily where IFR (Instrument Flight Rules) operations are conducted at high altitudes. Class B airspace surrounds busy airports, and the transponder helps ATC communicate with and track aircraft more effectively, thus preventing accidents. Class C airspace also demands a Mode C transponder since it includes controlled airports with significant traffic but lower levels of congestion than Class B.

While a Mode C transponder has specific requirements for various airspaces, it is not limited to just Class B airspace or solely relevant for night flights. Additionally, the requirement of having a transponder only for flights above 5,000 feet is inaccurate, as the transponder is necessary in the aforementioned classes of airspace regardless of altitude. Therefore, having a Mode C transponder is vital for ensuring situational awareness among pilots and air traffic controllers in these controlled environments.