What command is given when an observer achieves a measurable airburst during the precision registration time portion?

When an observer achieves a measurable airburst during the precision registration time portion, the command given is "3 Rounds Repeat." This command indicates that the observer has established enough confidence in the data collected to warrant firing multiple rounds to ensure accuracy and to refine the aiming point.

The "3 Rounds Repeat" specifically signals that three additional rounds should be fired at the same target to confirm the desired effects and to gather data on how closely the rounds cluster around the intended impact area, reinforcing the registration and improving the effectiveness of subsequent fire missions. This practice enhances the artillery's capability to adjust fire and optimize its impact on the target area based on the initial measurements and observations made by the observer.

In situations where there is less certainty or when initial data is incomplete, a different command may be used, indicating fewer rounds are required to verify or adjust the firing data.