Which of the following is NOT a class of fire in relation to the gun?

The classification of fire in relation to machine guns includes types that describe how the gun is aimed and fired to engage targets effectively. "Fixed," "Traversing," and "Searching traverse" are all recognized terms that explain specific firing techniques used to manage target engagement.

Fixed fire refers to a situation where the gun is aimed at a specific point and fired without moving the weapon to track targets. Traversing involves moving the gun from side to side to engage targets in a lateral area without changing the elevation. Searching traverse describes a method where the gun moves in a horizontal plane, sweeping an area to find targets within a specified depth.

In contrast, "Sweeping" is not formally recognized as a class of fire in the same way as the others. While sweeping might colloquially refer to the act of moving the gun to cover an area, it lacks the technical and tactical specificity that the other terms possess. Therefore, it does not represent a distinct type of fire in machine gun operations. Understanding these classifications is crucial for effective tactical training and operations in using machine guns.