What is the minimum runout distance required for an MAAS site?

The minimum runout distance required for a Military Airfield Assessment Site (MAAS) is determined by safety and operational protocols to ensure that aircraft can safely come to a stop after landing or during an aborted landing. In this context, the correct choice identifies the specific requirement of 990 feet plus the length of the aircraft.

This requirement is particularly significant because the runout distance must accommodate the dynamics of various aircraft types, their landing speeds, and potential stopping scenarios. The established guideline of 990 feet ensures that even under less-than-ideal conditions—such as wet or icy runways—there is sufficient space for a safe stop. This distance supports both the effectiveness of the operation and the safety of the aircraft and personnel involved.

The other choices, while close, do not meet the specific criterion set forth in typical operational standards for MAAS design. The selection of 990 feet reflects a careful consideration of aviation safety regulations aimed at maximizing operational reliability in military airfield contexts.