Which suffix indicates an aircraft that is fully equipped with a transponder and DME?

The suffix that indicates an aircraft is fully equipped with a transponder and Distance Measuring Equipment (DME) is typically represented by the letter "C." When referring to aircraft equipment codes, certain letters are designated to denote specific capabilities and equipment installed on the aircraft. In this context, "C" signifies that the aircraft meets the criteria of being equipped with both a transponder—which is crucial for radar identification and tracking by air traffic control—and DME, which is essential for accurate distance measurement during navigation.

Understanding these suffixes is vital for air traffic controllers when verifying aircraft capabilities and ensuring safe and efficient operations in controlled airspace. The other suffixes denote different levels of equipment capabilities, but they do not specifically indicate the presence of both a transponder and DME as "C" does.