What characterizes a primary service airport regarding enplaned passengers?

• A. It serves 20,000 passengers annually
• B. It serves 15,000 passengers annually
• C. It serves 10,000 passengers annually
• D. It serves any number below 10,000 passengers

Answer: (C)

A primary service airport is defined by a minimum threshold of enplaned passengers. The correct characterization of a primary service airport is one that serves at least 10,000 passengers annually. This benchmark is significant because it determines the level of federal funding and support the airport may receive. Airports meeting or exceeding this figure are often considered vital for regional air travel, impacting community connectivity and economic viability.

The options that present different thresholds below this number do not align with the Federal Aviation Administration (FAA) definition for primary service airports. Specifically, serving fewer than 10,000 passengers disqualifies an airport from being categorized as a primary service airport, indicating a lower level of air traffic and service. Thus, the answer reflecting a service level of 10,000 passengers aligns with established regulatory guidelines and highlights the airport's importance in the aviation network.