Which of the following is NOT a method of deliberate range determination?

Deliberate range determination refers to the methods used to accurately assess the distance to a target before engaging it. Each of the other options represents a recognized method of making this determination.

Adjacent units refer to collaborating with nearby units to confirm target ranges, thereby enhancing accuracy through shared knowledge and experience. Flash to bang is a method used primarily in artillery where the time interval between seeing a muzzle flash and hearing the report is measured to calculate range based on the speed of sound. Maps and digital map references provide a topographical basis for estimating distances, utilizing scale and features to determine the appropriate range to a target.

Wind velocity calculation, while important for ballistic adjustments and overall fire correction, does not directly aid in the methodical determination of the distance to a target. Instead, it affects projectile trajectory after the range has already been established. Therefore, it does not fit within the framework of deliberate range determination methods.