Which characteristic is true of indirect fire?

Indirect fire is characterized by the use of high elevation angles to engage targets that are not in the direct line of sight of the gunner. This method typically involves artillery, mortars, or other similar systems where the projectile follows a curved trajectory. By aiming at a higher angle, the munition can cover ground and reach targets located behind obstacles or at significant distances.

This characteristic is crucial because it allows forces to strike targets that are otherwise hidden or protected, which enhances the tactical options available on the battlefield. The other options do not accurately reflect the nature of indirect fire; for example, the gunner not needing to see the target directly is a fundamental aspect of this method, and indirect fire can be quite lethal depending on the munitions used. Moreover, indirect fire is frequently employed in combat situations when targeting positions that are not directly observable.