What is meant by "high angle fire"?

High angle fire refers to the technique of shooting projectiles at steep vertical angles. This method is typically employed with artillery and other indirect fire systems to target enemy forces or fortifications located behind obstacles, such as hills or mountains, that cannot be engaged effectively with direct fire.

When utilizing high angle fire, the projectile follows a high-arc trajectory, which enables it to drop down onto targets that are not in the direct line of sight. This is particularly useful in situations where a direct line of fire is obstructed by terrain features. The ability to engage targets from such angles can provide a tactical advantage in combat scenarios.

The other choices describe alternative firing techniques that do not involve steep angles, making them unsuitable in contexts where high angle fire is necessary.