The smoke stack on the USCG Cutter Duane, sunk as an artificial reef off the coast of Key Largo, Florida, USA. The Duane was intentionally sunk as an artificial reef on November 27, 1987. She came to rest upright on the sandy bottom in approximately 130' of water, about a mile south of Molasses Reef. She was commissioned on 8/1/36, is 327 feet long with a beam of 41'.