Which technique is not used for correcting range in fire adjustments?

The technique that is not used for correcting range in fire adjustments is instant correction. In the context of artillery and fire support, correcting range typically involves methods that provide a systematic approach to adjusting fire based on observed impacts.

Successive bracketing involves firing rounds that progressively narrow in on the target location by firing rounds shorter or longer than the previous impacts until the target is hit. This technique effectively helps in zeroing in on the correct range.

Creeping fire is a technique where rounds are fired in a manner that gradually moves towards the target, essentially walking the fire closer in a controlled manner. This allows for continuous adjustment based on the observed effects.

Hasty bracketing is a quicker method of range correction that combines rapid adjustments for a faster response. It typically involves firing one round too short and one round too long around the target location, helping to quickly determine the correct range.

In contrast, instant correction lacks a systematic approach and does not fit within the established methodologies for adjusting fire. It does not utilize observing and then making adjustments based on impacts, which is crucial in effectively correcting range in artillery fire. Therefore, it is not recognized as a valid technique for range correction.