What is the automatic HOB correction for the time portion of the precision registration if the first round is spotted as a graze burst?

In the context of artillery precision registration, when the first round is spotted as a graze burst, it indicates that the round struck the ground at a low angle and may not have had the optimal effect. The automatic height of burst (HOB) correction applied is important for adjusting subsequent rounds to ensure a more effective impact.

A graze burst typically suggests that the round impacted too low, which necessitates an upward correction to achieve the desired effect on target. The standard automatic correction for a graze burst is to raise the height of the burst by 40 meters. This adjustment helps in ensuring that the next round will provide a better detonation height to maximize fire effectiveness on the target area.

Understanding the reasoning behind the automatic correction is crucial for optimizing fire support operations and ensuring that artillery strikes are accurately placed for maximum impact.