What airspace classification might require a specific transponder for operation?

Class C airspace requires a specific transponder for operation. In this type of airspace, aircraft must be equipped with a mode C transponder, which displays altitude information and provides additional radar services to enhance safety and situational awareness. This requirement is implemented to ensure that air traffic control can adequately monitor and manage the traffic within busy areas often associated with airports that serve commercial operations. Class C airspace is generally found around airports with a control tower, which necessitates the use of specific transponder technology to maintain safe and orderly flight operations.

Other airspace classifications may have different requirements for transponder use. For instance, while Class A airspace does require a transponder, it is typically designated for aircraft flying at higher altitudes, and the requirements for transponder specifications differ from those in Class C. Class D airspace has its own rules, but they do not mandate transponder use unless otherwise specified by the air traffic control tower. Class E airspace has varying requirements depending on the subcategory, and transponder use is generally not required unless specified by the regulations for specific operations.