Sheppard Introduction to Fighter Fundamentals (IFF) A/G Practice Test

The main idea is the distance along the line of sight from the aircraft to the target at the moment of release. This is the straight-line distance through space, not just the ground distance, so it combines both how high you are and how far you are horizontally from the target. That straight-line distance is called slant range.

You can think of it like a right triangle: the vertical separation (aircraft altitude above the target) and the horizontal separation (ground distance to the target) form the legs, and the line from the aircraft to the target is the hypotenuse. The slant range is this hypotenuse, found by the Pythagorean relationship. This distance matters at release because it relates to the bomb’s initial velocity and timing needed to hit the target, especially when wind and aircraft motion are involved.

Time of fall describes how long the bomb stays in the air, not how far away the target is along the line of sight. Bomb trajectory is the curved path the bomb follows due to gravity and drag, not a single straight-line distance. Initial aim-off angle is the adjustment used to compensate for wind or motion, not the distance itself.