What correction value is indicated for one airburst and one graze burst during registration?

The correct answer reflects procedural guidance regarding artillery registration, particularly in identifying the need for adjustments based on observed impacts. During registration, if a scenario involves one airburst and one graze burst, it may indicate that the rounds are accurately impacting where intended, and therefore, no correction is required.

In this context, the airburst may effectively achieve the desired effect over the target, while the graze burst confirms a stable and valid line of fire. Thus, if both types of bursts are accomplishing the mission objectives without necessitating alterations to trajectory or elevation, concluding that no correction is necessary aligns with standard operational protocol. This understanding of when adjustments are warranted is crucial for effective artillery operations and achieving desired targets efficiently.