SS Shieldhall is the largest remaining steam powered general cargo-passenger ship in the world. She was laid down in October 1954 and entered service in October 1955. Built by Lobnitz & Co., of Renfrew, she is of riveted and welded construction with a straight stem and a cruiser stern.
She was operated by Glasgow Corporation to transport treated sewage sludge down the Clyde to be dumped at sea.
She later started to carry sludge from Southampton to an area south of the Isle of Wight for the Southern Water Authority until 1980 she was later sold to a preservation group for £20,000