Rollout of the Jimmy Carter from the Electric Boat Building Facility at night.  Hull sections are placed on individual wheeled mobile carriers.  When the submarine sections have been welded together, the carriers are used to move the completed hull outside, following a set on rails.  There are a second set of rails perpendicular to the rails used to move the hull out of the building.  Another set of wheels can be lowered to move the hull sideways. The hull is moved onto a section of decking that can be lowered into a graving dock, which can be flooded and a gate opened out to the Thames River.