Which class of fire involves moving the weapon both vertically and horizontally to engage targets?

The class of fire that involves moving the weapon both vertically and horizontally to engage targets is known as traversing and searching fire. This method allows the gunner to engage different targets that may be spread out over a certain area.

In traversing and searching fire, the gunner can sweep the weapon across a horizontal plane (traversing) while also adjusting the vertical plane to account for different ranges and elevations of the targets (searching). This is essential in combat situations where targets can be located at various distances and heights, allowing for a more effective and comprehensive engagement of enemy forces.

This technique is especially useful in suppressive fire scenarios, where the aim is to keep the enemy suppressed across a broader area while also accounting for movement, cover, or concealment. The integration of both movements ensures that the weapon remains effective even when targets are on uneven ground or when they seek cover.