What you are seeing here is four days of work compressed into less than two minutes. This is the time-lapse video of the rollout, flooding and launch of Virginia-class submarine Washington (SSN 787) at Newport News Shipbuilding. Then this submarine is off for sea trials, and then to the Panama Canal to join the fleet at the Bangor Base, Washington.
Time-Lapse Submarine Launch
Video by Huntington Ingalls