This 119’ freighter was one of 965 landing craft utility (LCU) vessels built during World War II. These general‐purpose amphibious vessels were sold or transferred under military aid programs. The vessel was purchased and converted into a general cargo ship. In 1978, US Customs Service agents discovered 3,168 pounds of marijuana sealed in drums aboard and subsequently seized the vessel. The US Government sought forfeiture of the vessel due to violation of numerous narcotic smuggling laws, which was ultimately granted by US District Court in 1981. In 1983, the judgment was reversed due to a failure to prove either the owner or the captain of the vessel was privy to the illegal activity. While the vessel was released, the Shamrock did not operate long before her engine failed, and she was tied up along the Miami River. After sitting idle for almost a year, her owner agreed to sell her to Miami-Dade County. With the help of 200 pounds of dynamite and 30 tons of concrete blocks, the Shamrock was scuttled to serve as an artificial reef in 1985. She came to rest upside down off Miami Beach and is a good site for novice divers with abundant marine life.