At Patriot's Point, "this true-to-scale exhibit shows the operational and living areas of a U.S. Naval Advanced Tactical Support Base (ATSB) during the Vietnam War. The visitor is taken back to South Vietnam (1965-71) when the US Navy supported ground troops and counterinsurgency operations throughout the vast network of waterways. The primary mission of the "Brown Water Navy" was to block the movement of insurgents and their supplies into South Vietnam. The exhibit features a rare Mark 1 River Patrol Boat (PBR)..."

Text source: http://www.patriotspoint.org/exhibits/vietnam_base/