
Standing on the Winchelsea road almost two miles inland, the purpose of Tower 30 was to defend the sluices of the Royal Military Canal and those of the Rivers Brede and Tillingham.
Being moated, this tower was one of only two to have an extra defensive feature in the form of a wet ditch that surrounded the bank into which the tower and moat were dug.1 This wet ditch was known as a cunette. The other tower to have one was Tower N of the East coast chain.2

By 1873, the tower was not armed, but the Committee on Coast Defences recommended that it be retained to guard the sluices, although mainly for use as a magazine.3
The tower was not added to in 1940, but conversion to a residence took place after the war. It stands in the yard of a scrap dealer, part of the moat and bank having been removed and appears to be uninhabited at present.