135.—Protective Formation against all types of shells.
As may appear from the study of the above the following formation and intervals will afford the best protection against all types and combinations of types of shells, as a shell will never affect more than one section.
Advance in lines of sections in double file, keeping as closed up as possible, with 85 to 110 yards intervals[G] between sections.
The second line should be 250 to 300 yards behind the first.
FOOTNOTES:
[E] Inclination of the line of sight to the horizontal.
[F] The vertical inclination of the gun.
[G] All through this chapter, maximum intervals are given. They may have to be shortened to secure closer order at the expense of greater safety.