Which of the following accurately reflects the capabilities of a fully instrumented airfield?

The correct answer highlights that a fully instrumented airfield is equipped to operate with both airport surveillance and precision approach radar. These systems are essential for managing air traffic and ensuring safe landings and takeoffs, especially in conditions where visibility may be compromised. Precision approach radar aids pilots in making accurate landings by providing precise guidance, while airport surveillance radar helps with the monitoring of aircraft in the vicinity of the airport.

In contrast, the other choices do not adequately describe the capabilities of a fully instrumented airfield. Visual flight operations, which rely solely on the pilot's visual references, limit operational capability during adverse weather conditions. Basic communication tools with aircraft are not sufficient for seamless and safe operations at an advanced airfield, which demands more sophisticated equipment for effective air traffic management. Lastly, a focus only on ground vehicle movement neglects the key component of air operations and fails to address the comprehensive needs of an instrumented airfield, which is designed to support both air and ground operations extensively.