Caribbean and Latin American countries to deal with drug trafficking, illegal immigration and other problems. The main purpose of the base was tactical support for land/sea/air maneuvers on Vieques Island. In 1969, the US Navy established Camp Moscrip which held a rotating US Navy Construction Battalion (Seabee). For the next 47 years the base was utilized for flight practice, as well as other missions and control of the area's air space. In August 2002, a MC-130H airplane carrying seven airmen crashed in the town of Caguas, while en route from Roosevelt Roads to Rafael Hernández Airport in Aguadilla. All seven perished, in the largest air tragedy in Caguas's history. Within the industrial area the drydock, a bombproof power plant, a sewage pumping station, and a machine shop were completed. The drydock, 1100 by 155 feet, and built in the dry, was first used in July 1943. The power plant, a bombproof structure with 4-foot-thick concrete walls, was equipped with two 5,000-kw steam-driven generators. The drydock was dedicated on 15 February 1944, and the Bolles Drydock, in memory of Captain Harry A. Bolles, (CEC) USN, who was killed in Alaska in World War II. In 2003, a military appropriations bill required the Secretary of the Navy to close within six months of the enactment of the act. The base officially closed on 31 March 2004. At the time, there were nearly 1,200 active-duty officers and sailors at Roosevelt Roads. United States Special Operations Command South moved from Roosevelt Roads to Homestead Air Reserve Base. U.S. Naval Forces Southern Command moved from Roosevelt Roads to Mayport Naval Station. Naval Mobile Construction Battalion (NMCB) 74 (Seabee) moved from Roosevelt Roads to Little Creek, Virginia. When Roosevelt Roads closed, the only U.S. naval base in the Caribbean was the Guantanamo Bay Naval Base. From the time that Congress voted to close the base until its closure, Roosevelt Roads closed faster than any other military installation on US soil in several decades. After its closure, 200 sailors and civilians remained to help in the transition from a naval base to a naval agency coordinating the closing process. Of the former base's property, about 30% was transferred to the government of Puerto Rico and its municipalities, 40% became a wetlands preserve, and the remainder was offered for sale at public auction. US Naval Forces Southern Command U.S. Naval Forces Southern Command (NAVSO) directs naval forces and