When is hot refueling typically performed?

Hot refueling is a process where fuel is added to an aircraft while the engines are still running. This procedure is particularly important in military operations where time and readiness are critical. By refueling while the engine is on, the aircraft can remain in a state of readiness for immediate flight, allowing for quick turnarounds between missions.

This method is commonly utilized during combat operations or high-tempo environments where aircraft need to maintain operational readiness without the delay of shutting down and restarting engines. It requires strict adherence to safety protocols to mitigate the risks associated with fueling an active aircraft. The other options don't adequately capture the typical use case for hot refueling, as it is primarily designed for scenarios that necessitate rapid airport turnaround times, especially in combat situations.