When three airbursts and one graze burst are spotted, what is the HOB correction during precision registration?

When determining the height of burst (HOB) correction during precision registration, it is crucial to understand the significance of airbursts and graze bursts. An airburst occurs when the projectile detonates in the air, which is effective for achieving a wider area of effect, while a graze burst occurs closer to the surface.

In the case where three airbursts and one graze burst are observed, the presence of more airbursts indicates that the rounds are detonating higher than intended. However, having a graze burst provides a reference point that suggests the need for adjustment.

In this scenario, the correction deemed necessary is no correction at all. This conclusion can be reached because the data from the bursts does not necessitate a change – the airbursts are acceptable for the intended purpose, particularly in a precision registration context.

The specific case of having predominant airbursts often suggests that the rounds are functioning as anticipated for the mission objectives, particularly in regards to area denial or suppression rather than requiring a change to a lower burst height. Thus, no additional adjustment is indicated, making the determination that no correction is required the correct response.