When using successive bracketing, when does an observer request FFE?

The correct answer highlights the principle of successive bracketing, which is a method used to refine artillery fire on a target. In this procedure, the observer identifies the initial impact points of the first rounds and then requests subsequent rounds based on those impacts.

When working with successive bracketing, the observer typically starts with a wider spread of fire and narrows it down to ensure accuracy. A 100-meter bracket provides a significant range that helps in identifying initial misses and subsequently tightening the fire onto the target. Once the bracket of 100 meters is split, meaning a round is fired that lands in between the two initial rounds, it indicates that the observer has effectively narrowed down the potential range to a smaller area for the next round of fire.

This careful analysis allows the observer to refine targeting and significantly increases the likelihood of hitting the intended target with the follow-on rounds. Following this method ensures that the fire support remains effective while minimizing the risk of overshooting or undershooting based on the results from the bracket splits.