What defines free gun fire?

Free gun fire is characterized by the engagement of moving targets that necessitates adjustments not only in direction but also in elevation. This definition reflects the dynamic nature of the target movement, requiring the gunner to correctly track and assess the target’s trajectory in real-time to effectively impact it, which is a key skill in machine gun employment. Successful engagement of such targets emphasizes the importance of maintaining situational awareness and the ability to mechanically adjust the firearm's aim quickly and efficiently.

The other definitions, while related to shooting scenarios, do not encompass the specific challenges posed by moving targets that require these dual adjustments. This makes the correct choice pivotal in understanding the complexities of machine gun employment in tactical situations where target movement is a significant factor.