What is the relationship of small elevations?

The correct response indicates that small elevations are characterized as being greater than 30 mils but less than 90 mils. This range encapsulates the typical adjustments necessary for mortar fire in response to changes in terrain and target elevation, which is critical in ensuring accuracy during indirect fire operations.

In mortar systems, mils are a unit of angular measurement that relate to how observers and operators calculate distance and elevation changes. Elevation adjustments are particularly crucial when dealing with varying terrains, as they can significantly affect the trajectory of mortar rounds. A range of greater than 30 mils acknowledges the necessary nuance in elevation needed to effectively engage targets located at different heights relative to the firing position.

The upper boundary of 90 mils in this answer represents the operational limits typically used in mortar adjustments, confirming that the stated range encompasses the majority of small elevation changes encountered in practical scenarios. This understanding is vital for soldiers to ensure precise targeting and effective use of mortar systems in the field.

Thus, identifying small elevations in this specific range enables operators to apply the right calculations for effective mortar placements during various combat situations.