What does "hot load" mean in air operations?

In air operations, "hot load" refers specifically to the practice of loading troops or cargo onto an aircraft while the aircraft is still running. This involves conducting loading operations with the aircraft's engines operating, which can be critical in tactical situations where speed and efficiency are paramount.

The "hot load" procedure is essential for ensuring that an aircraft is prepared for immediate departure, allowing for rapid insertion or extraction of personnel and equipment in combat or time-sensitive scenarios. The ability to load while the engines are running minimizes exposure to potential threats and increases operational tempo, which is vital in many military missions.

In contrast, other options like loading equipment while the aircraft is in the air or loading only medical supplies during emergency operations do not encapsulate the meaning of a "hot load" as per military operational standards. Loading materials in a cold aircraft also contradicts the essence of a "hot load," as it implies the engines are turned off and the aircraft is not ready for immediate takeoff.