Plymouth Breakwater Fort

A scan of the fort in the sea of Plymouth Breakwater in the UK. Created using a drone capturing about 200 oblique images (sampled from a video) at 30m above sea level. In 1860, a Royal Commission, established by Lord Palmerston, produced a plan for the defence of Plymouth and other Royal Dockyards.[12] The Breakwater Fort was designed to defend the entrances to Plymouth Sound in conjunction with forts and batteries on either shore. Designed by Captain Siborne, work on the oval masonry sea fort started in 1861 and the main structure was completed in 1865. It has its foundations on Shovel Rock and is 35 yards inside the Breakwater. After several changes in plan, the fort was finally armed in 1879 with fourteen 12.5-inch and four 10-inch rifled muzzle-loading guns in armoured casemates. Although the fort had been disarmed before World War I, it served as a signal station, and from 1937, an anti-aircraft training school. It was finally released by the military in 1976.