The fire trench is connected with the cover for supports by a system of zigzag trenches having the profile shown in Plate 23. The arrangement is shown in Plate 1.
Plate 25.—Profile of trench mortar emplacement.
Trench Mortar Positions
Somewhere between the first line fire trench and the cover for the supports is a line of emplacements for the trench mortars. Plate 25 shows a profile of the emplacement.
The arrangement of the position is shown in Plate 1.
Plate 25a.—Trench mortar.