was designated under the Protection of Wrecks Act on 26 November 1998 and redesignated to extend the area covered on 5 October 2004. References External links The Spindle Hull Types - Holland, A, B and C Classes evolution and design of early Royal Navy submarines Wessex Archaeology multibeam sonar image of the wreck of HMS A1 surveyed in 2003 and later images from a dive "HMS/m A1" National Heritage List for England A-class submarines (1903) Protected Wrecks of England British submarine accidents 1989 archaeological discoveries Maritime incidents in 1904 Ships built in Barrow-in-Furness Royal Navy ship names Shipwrecks in the English Channel Wreck diving sites in England 1902 ships Maritime incidents in 1910 Maritime incidents in 1911 March 1904 events History of West Sussex 1989 in England