Which type of fire distributes rounds in depth through changes in elevation?

Searching fire is the term used to describe a technique utilized to distribute rounds in depth through changes in elevation. This type of fire allows a round to be delivered across a terrain that may have various elevations, such as hills or slopes, effectively engaging targets that are not all on the same level. By adjusting the elevation of the weapon, troops can ensure that rounds reach multiple layers of the target area, making it effective against troops in trenches, on slopes, or behind cover that varies in height.

In contrast, flanking fire, oblique fire, and frontal fire are characterized by their orientation relative to the target, but they do not specifically involve adjusting elevation to achieve coverage across a vertical plane. Flanking fire typically targets the enemy from the side, oblique fire is aimed at an angle to the front of the target area, and frontal fire engages the enemy directly in front of the firing position. While all these tactics are useful in different contexts, they do not address the requirements of distributing fire across changing elevations.