Q. Define sight elevation.
A. The angle between the axis of the bore before firing and the line of sight. (See Figs. 63 and 64.)
Q. In case shot strikes to the right or left, and as gunner you had the sight on the target when the shot struck, how could you correct your error with a telescopic sight or open sights?
A. Stopping traversing at the instant shot strikes, move the vertical hair rapidly to the splash. The sight is now corrected for the error, and its setting will be correct for the next shot.
The Range-board.
NOMENCLATURE. (See Fig. 65.)
The Frame.—The outside frame, or box, of the instrument.
The Board.—That upon which the charts are pasted. K-K.