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.
Plate 25.—Profile of trench mortar emplacement.
The arrangement of the position is shown in Plate 1.
These trench mortars are used to hurl charges of high explosives varying from 25 to 100 pounds into the enemy's lines. They have a range of from 300 to 1,800 yards.