The Thompson Dry Dock, or Thompson Graving Dock, is a dock located in Belfast, Northern Ireland. Built in 1904, the then biggest in the world dock is best known for having accomodated the RMS Titanic during her fitting-out. The dock is 415 feet long, 46 feet wide and 21 feet deep. The dock was capable of draining 26,000,000 gallons of water an hour. Dry docks are different from normal docks as they can drain out water, revealing the entirety of a ship's hull for painting or repairing.