The product of OT Factor and Spotting yields the deviation correction. In which unit is this correction typically expressed?

The product of OT Factor and Spotting yields the deviation correction. In which unit is this correction typically expressed?

• A. Feet
• B. Meters
• C. Miles
• D. Kilometers

Answer: (B)

The deviation correction is a linear distance on the ground. When spotting error is converted by the OT factor, it becomes a physical shift you apply to the aim point at the target range. That ground-distance correction is expressed in meters because artillery fire-control uses metric units for range and position, and a small angular error translates into a concrete distance at the target range. Using meters keeps the correction precise and directly usable with the gun’s elevation and deflection settings. Feet or miles would be awkward or too coarse for the typical small adjustments, and kilometers would be far too large for a single correction. For example, at a 2,000 m range, a 1 mil error corresponds to about 2 meters of deviation, which is conveniently expressed in meters for immediate application.

The deviation correction is a linear distance on the ground. When spotting error is converted by the OT factor, it becomes a physical shift you apply to the aim point at the target range. That ground-distance correction is expressed in meters because artillery fire-control uses metric units for range and position, and a small angular error translates into a concrete distance at the target range.

Using meters keeps the correction precise and directly usable with the gun’s elevation and deflection settings. Feet or miles would be awkward or too coarse for the typical small adjustments, and kilometers would be far too large for a single correction. For example, at a 2,000 m range, a 1 mil error corresponds to about 2 meters of deviation, which is conveniently expressed in meters for immediate application.