TS Queen Mary is a Clyde steamer launched in 1933 at the William Denny shipyard, Dumbarton, for Williamson-Buchanan Steamers. She is currently being restored as a museum ship, in Glasgow. Design and construction TS Queen Mary originally measured 871 gross registered tons and was powered by three direct drive steam turbines built by Parsons Marine Steam Turbine Company. With a passenger certificate for 2,086 passengers (later reduced to 1,820) she was the largest (though not longest) steamship on the River Clyde. Following the completion of her trials during which a maximum speed of was achieved on the Skelmorlie measured mile she joined Williamson-Buchanan's fleet on 20 May 1933. Service history Williamson-Buchanan based TS Queen Mary at Glasgow's Bridge Wharf, where she carried approximately 13,000 passengers each week. TS Queen Mary sailed during the summer season for the Arran coast, or for the Kyles of Bute. In 1935, Cunard Line asked Williamson-Buchanan to change the name of TS Queen Mary to TS Queen Mary II, in order to make the name available for their new flagship liner, which was due to be launched by Queen Mary. The owners of Williamson-Buchanan duly agreed and in exchange, Cunard Line presented them with a portrait of Her Majesty to hang in the forward lounge of the steamer. In 1936 the entire Williamson-Buchanan fleet, including TS Queen Mary II, passed into the ownership of the London, Midland and Scottish Railway Company. Later that same year she joined Williamson-Buchanan Steamers (1936) Ltd. During World War II she provided a mail and passenger service to the Scottish Islands. She was refitted and repainted in LMS colours after the war and returned to her normal passenger service. In 1948, nationalisation of the railways brought all the remaining passenger ships under the ownership of the Caledonian Steam Packet Company. Over the winter of 1956-1957, Barclay Curle changed the fuelling of the propulsion system from coal to oil. This necessitated removing the two original Scotch boilers and replacing them with one new single ended boiler and the installation of one large, futuristic funnel in place of the original two. In addition, a new mainmast was added so that TS Queen Mary II now had the requisite two required to meet the new regulations for ship lighting. After all of this work was completed, the vessel's tonnage increased to 1014 GRT. In the 1960s there was a decline in passenger sailings