Note 6 — Chapter IV · GUNNERY.
Reading edition
“Ranging” and “Range-finding” must not be confused with one another. The latter is the measurement of the distance in yards to the target by mechanical means, and the former the process by which the elevation necessary to make a shell travel that distance is ascertained, an elevation which, owing to the various causes mentioned above, will rarely correspond with the distance given by the range-finder.