The MY Lady of the Lake is a passenger vessel operating for Ullswater 'Steamers' on the lake of Ullswater in the English Lake District, where she has spent her entire working life. She was built in 1877 as a steam vessel, but converted to diesel power in 1936. She is believed to be the oldest working passenger ferry in the world, and is a member of the National Historic Fleet. The Lady of the Lake has a length of 96.95 feet (29.55 m), a beam of 14.75 feet (4.50 m) and a draught of 2.39 feet (0.73 m). Her gross tonnage is 43, and she can carry 200 passengers.