The Drop Redoubt was a key element of the Western Heights fortifications. At the centre of the fort, in front of the barracks, is a Parade Ground or yard, a small rectangle of 36m by 11.5m, now mostly covered in grass. It appears to have been paved with large brick-shaped cobble stones, though areas have been patched with concrete. Encircling the Parade Ground is a stone pavement and gutter. A water tank stood in the centre. (location accurate to the nearest 1m based on available information)