(3) The armour of the cruiser must be proof against concentrated rifle and machine-gun fire, but not proof against artillery fire. The whole cruiser should be enclosed in armour.
Plate I
LITTLE WILLIE.
MARK IV TANK (FEMALE).
(4) The tactical object of the cruiser is attack, its armament should include a gun with reasonable accuracy up to 1,000 yards, and at least two Lewis guns, which can be fired from loopholes to flank and to rear.
(5) The crew to consist of six men—two for the gun, one for each Lewis gun, and two drivers.
(6) The caterpillar must be capable of crossing craters produced by the explosion of high-explosive shell, such craters being of 12 ft. diameter, 6 ft. deep, with sloping sides; of crossing an extended width of barbed-wire entanglements; and of spanning hostile trenches with perpendicular sides and of 4 ft. in breadth.
(7) The cruiser should be capable of moving at a rate of not less than 2½ miles per hour over broken ground, and should have a range of action of not less than six hours consecutive movement.