The Hamilton Dock is the oldest graving dock on the Co. Down side of the River Lagan, built between 1864 and 1867. A graving dock is a nautical term for an enclosed basin into which a ship can be taken for underwater cleaning or repair. The Hamilton Dock is now listed as a historic scheduled monument, and for more than 120 years it was used for repairing, maintaining and fitting out ships. The Hamilton Dock is now home to the SS Nomadic.