SS Castilian (1919)

SS Castilian was a British cargo steamship and is now a dangerous wreck in the Irish Sea off the coast of North Wales. She was built in 1919 to a standard First World War design. In 1943 while carrying munitions she struck rocks off The Skerries, Isle of Anglesey and sank. An exclusion zone under section 2 of the Protection of Wrecks Act 1973 (Prohibition on approaching dangerous wrecks) forbids scuba diving within 500 metres (1,600 ft) of the wreck because her explosive cargo remains dangerous.