Designed as a shelter‐deck coaster, the Castor was built as the Dynacontainer IV, but launched as the Dorothee B05 in 1970 at the Martenshoek, Netherlands shipyard of Bodewes Scheepswerven B.V. Over the next three decades, her name would change 14times before ultimately being renamed Castor in 1998. She w a s 250 feet in overall length, 39 feet wide,  and displaced 499 tons. On May 31, 1999, the Castor was stopped north of Venezuela by the H.M.S.

Marlborough, which was carrying US. Coast Guard law enforcement officers. The boarding party found 8,687 pounds of cocaine in one of the Panamanian freighter’s shipping containers, which, at the time, was the twelfth largest seizure on record. After being escorted to Miami, the Castor was eventually abandoned by its owner and became a derelict. The freighter was then acquired by Palm Beach County for use as an artificial reef, and subsequently scuttled south of Boynton Inlet on December 14, 2001.

The wreck of the Castor now rests upright in 110 feet of water with its bow oriented to the south. She rests approximately 700 feet to the northeast of the Budweiser Bar wreck. Divers will encounter the Castor’s main deck at 90 feet, which has already been transformed into a vibrant tapestry of color by encrusting marine life. Portions of her starboard hull and wheelhouse have collapsed, most likely due to the unusual hurricane season of 2004.