Which of the following is NOT a feature of a fully instrumented airfield?

A fully instrumented airfield typically includes features that enhance its operational capabilities, particularly for aircraft landing and takeoff in various weather conditions. These features facilitate safe and efficient operations, especially in low visibility situations.

The presence of a control tower is essential for traffic management and coordination of flight operations, ensuring that all aircraft can safely navigate the airspace around the airfield. Precision approach radar is crucial as it aids pilots in determining their exact position relative to the runway during the approach phase, further improving safety and efficacy in challenging conditions. Airfield lighting systems are designed to support operations during nighttime or poor weather, helping guide pilots for landing and takeoff.

In contrast, while passenger terminal services are important for commercial air travel, they do not directly contribute to the instrumented capabilities of an airfield, which are focused on managing air traffic and ensuring safe landing approaches rather than on passenger operations. Therefore, passenger terminal services stand apart from the critical operational features that define a fully instrumented airfield.