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The Naval Surface Warfare Center in Carderock, Maryland is home to a unique facility that is one of the largest of its kind. The maneuvering and seakeeping basin or MASK facility is one of the world’s largest indoor “oceans” and using hundreds of little “finger”-like paddles, engineers can simulate ocean conditions for any sea or ocean the globe over. The pool itself is over 240 feet wide, 360 feet long, and can hold up to twelve million gallons of water for the Navy to use in testing scale model versions of real-world ships and ships still in development against the actual wave and sea conditions they’ll be facing in the real world.