What is the basis of VCS in terms of aircraft types?

The basis of VCS, or Vehicle Compatibility Systems, focuses on the largest permanently-assigned aircraft type within a specific operational area. This selection is crucial for ensuring that the fire protection and rescue services are adequately prepared to handle incidents involving the largest aircraft expected to be stationed at that location.

Designating the largest permanently-assigned aircraft ensures that resources are appropriately scaled to meet the potential fire and rescue challenges posed by these aircraft. Such readiness includes having the right size and capacity of firefighting apparatus and developing tactics that align with the characteristics of these larger aircraft, such as their size, weight, and fuel load.

In contrast, considering the largest temporarily-assigned aircraft or smaller types, whether temporarily or permanently assigned, would lead to a mismatch in preparedness. It is essential for the response capabilities to align with the most demanding operational scenario, which the largest permanently-assigned aircraft represents.