The Sulphur Queen was a 523-foot tanker that was originally intended to carry oil, but was converted to carry sulphur.
On Feb. 3, 1963, the ship sent a radio report that placed it 230 miles southeast of New Orleans, La., according to a report by Time magazine. Then nothing.
There was no SOS and no warning of trouble. The ship simply disappeared.
Two weeks later, pieces of a raft, a life vest and a broken oar washed up on Florida beaches.
An investigation launched by the Coast Guard shortly after the disappearance concluded that the vessel was nowhere near seaworthy and likely caught fire at sea.
Such a conclusion was not far-fetched. According to the article, "once, the Queen actually sailed into a New Jersey port with fires smoldering, unloaded her cargo, and sailed off again -- still burning."