Tugs were amongst the first steam driven water-craft; the paddle-driven ''“Lady Charlotte”'' was built in 1802, and the first steam-powered vessels acquired by the [[Royal Navy]] were a pair of tugs in 1822. Screws (propellers) began replacing paddles during the middle of the 19th century, and diesel had replaced steam by the early years of the twentieth. | Tugs were amongst the first steam driven water-craft; the paddle-driven ''“Lady Charlotte”'' was built in 1802, and the first steam-powered vessels acquired by the [[Royal Navy]] were a pair of tugs in 1822. Screws (propellers) began replacing paddles during the middle of the 19th century, and diesel had replaced steam by the early years of the twentieth. |