131.—Case 4. High explosive shells bursting high.
The depth of the area of burst is longer than when shells burst at the right height; therefore widen interval between the lines.
132.—Case 5. Burst area of percussion high explosive shells.
The radius of the explosion is only about 25 yards but the local effect is intense and the displacement is effective in more than double the radius.
133.—Protective Formation against percussion high explosive shells.
Advance in line of section in double file, keeping as closed up as possible, with about 100 yards intervals between sections.
The second line may be about 50 yards behind the first.
GENERAL RECOMMENDATIONS AGAINST ALL TYPES OF EFFECTIVE FIRE.
134.—Dangerous to stop, useless to run.
Do not stop in a zone under fire for effect as lying down only provides a larger target. If absolutely obliged to stop, remain standing and packed together like sardines, maintaining above formations and intervals. It is useless to run, but, as much as possible, advance steadily.