When operating in Class C airspace, what is the minimum equipment requirement for an aircraft?

In Class C airspace, the key requirement is that aircraft must be equipped with an approved transponder with Mode C capability. This transponder is crucial as it allows air traffic control to identify and track the aircraft, enhancing overall safety and situational awareness in busy airport environments. By providing altitude information and transponder signals, the aircraft becomes more visible to air traffic controllers, facilitating better management and separation of air traffic.

Other equipment mentioned, such as dual navigation systems, radar altimeters, and autopilot systems, are not specifically mandated for operations in Class C airspace. While these may enhance aircraft capabilities, they are not considered minimum equipment requirements by Federal Aviation Administration (FAA) regulations for operating within this type of airspace. Therefore, the necessity of having an approved transponder stands out as the essential equipment for compliance and safe navigation in Class C airspace.