museum is the collection of historic vessels, which included the 1934 fireboat "Pyronaut" and two tugs: John King built as a diesel tug in 1935 and Mayflower, the world's oldest surviving steam tug built in 1861. On the quayside outside the museum are four electrically powered cargo cranes built in 1951 by Stothert & Pitt. A short distance to the west is much older crane, the sole surviving operational example of a Fairbairn steam crane. Built in 1878, also by Stothert & Pitt, it was in regular use until 1973 loading and unloading ships and railway wagons with loads up to 35 tons. It has been restored and is in working order, operating on some bank holidays and the Bristol Harbour Festival. Bristol Harbour Railway continues to offer train rides along the quayside on bank holidays, using restored steam locomotives and rolling stock. References Bristol Harbourside Grade II listed buildings in Bristol Grade II listed museum buildings Industry museums in England Museums in Bristol Defunct museums in England