On the night of 31 January/1 February 1953 , '' Sirdar '' was in dry dock at the naval dockyard at Sheerness , Kent when Sheerness was struck by the North Sea flood of 1953 . Flood waters caused lock gates to fail , flooding the dry dock holding '' Sirdar '' and causing her to capsize . She was refloated and returned to service
North Sea flood of 1953
North Sea flood of 1953
HMS Sirdar (P226)