The earthwork defences of the Citadel Battery consist of a sloping glacis on the seaward face falling to a steeper scarp, at the foot of which is a counterscarp bank. This defence was also carried around the western end of the battery. At the western end of the battery there is a more gentle slope for some 6.0m before a shallow ditch 2.8m wide by 0.2m deep. (location accurate to the nearest 1m based on available information)