Indirect fire
![Calling and adjusting indirect artillery fire on a target unseen to the soldiers manning the guns, a modern United States example](/Images/godic/202501/12/785px_Arty_Call_for_Fire_11342.jpg")
![A United States Marine lance corporal plots the direction and elevation of a mortar before firing.](/Images/godic/202501/12/USMC-081021-M-0007C-0081342.jpg")
Indirect fire is aiming and firing a projectile without relying on a direct line of sight between the gun and its target, as in the case of direct fire. Aiming is performed by calculating azimuth and elevation angles, and may include correcting aim by observing the fall of shot and calculating new angles.