What is the range refinement necessary if the registration point is nearer the last rounds fired?

When determining the range refinement necessary if the registration point is nearer the last rounds fired, the concept of "registration" in artillery operations is crucial. Registration involves adjusting the fire for accuracy based on previous data, usually in relation to a known point or target.

If the registration point is closer than where the last rounds landed, it indicates that the artillery unit is likely already hitting near the target. Therefore, no further adjustments or refinements are necessary because the current setup is already on the correct trajectory and distance. This results in a situation where the fire adjustment is optimal for the current conditions, allowing for continued effective targeting.

In contrast, options such as adding or dropping specific values would suggest modifying the current range, which is not required in this scenario since the range to the registration point has been confirmed as accurate. This reinforces the point that when the registration point is near the last point of impact, the artillery can maintain its current settings without any further corrections.