Changes in elevation (up or down 100), as required.
Combined Sights.
Range and differences.
Aiming mark.
Fire (signalled).
Changes in elevation (left gun up 200, right gun down 200) (or more, as required).
When Brigaded within Hearing.
The B.M.G.O. issues fire orders direct to the Nos. 1 as above.
When “differences” “by sections” are required the fire order will be as follows:—
B.M.G.O.