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| Submarine Sidon (wreck). This British 'S' class submarine sank twice. The first time was in Portland Harbour on June 16, 1955, after an explosion aboard. She was later raised, but was sunk again intentionally in 1957 in her present position for use as an ASDIC target. She lies N.W./S.E. at a depth of 34 metres and rises 8 metres off the seabed . She is intact, and makes an excellent dive. |