What does the term "airlift capability" refer to?

The term "airlift capability" specifically refers to the ability to effectively transport personnel and cargo from one location to another using aircraft. This capability encompasses several factors, such as the types of aircraft available, the load they can carry, and the efficiency with which they can perform these tasks. It highlights not only the physical aspect of transportation but also the operational capacity to respond to various needs, whether in military operations, humanitarian missions, or logistical support.

In this context, the other choices do not accurately capture the comprehensive scope of what "airlift capability" means. For instance, flying at high speeds is an operational characteristic of some aircraft, but it does not define airlift capability itself. Similarly, while the number of aircraft available may contribute to overall airlift potential, it alone does not equate to the ability to transport. Lastly, the range of onboard equipment is important for specific missions but does not inherently define the overall ability to transport personnel and cargo effectively. Thus, the correct answer encapsulates the primary function and purpose of airlift operations.