High Quality Content by WIKIPEDIA articles! HM Fort Roughs was one of several World War II installations, that were designed by Guy Maunsell and known collectively as His Majesty`s Forts or as Maunsell Sea Forts, and its purpose was to guard the port of Harwich, Essex. The naval fort is situated on Rough Sands, a sandbar located approximately six miles from the coast of Suffolk and eight miles from the coast of Essex.