 Hoo Island sits to the south of the Hoo Peninsula and is within the parish of Hoo, Kent.The fort can be viewed from along the Saxon Shore Way, accessible from Vicarage Lane in Hoo.Originally designed for two tiers of guns mounted in a circle, with a boom strung between Hoo Fort and Fort Darnet, there were many problems with subsidence, and after extensive cost overruns the forts were completed in 1871 with a single tier of eleven 9-inch rifled muzzle-loading guns, and no boom.