HMS Defiance was the last wooden line-of-battle ship launched for the Royal Navy. She never saw service as a wooden line-of-battle ship. In 1884 she became a school ship.

A training ship is a ship used to train students as sailors. The term is mostly used to describe ships employed by navies to train future officers. Essentially there are two types: those used for training at sea and old hulks used to house classrooms. As with receiving ships or accommodation ships, which were often hulked warships in the 19th Century, when used to bear on their books the shore personnel of a naval station, that were generally replaced by shore facilities commissioned as stone frigates, most "Training Ships" of the British Sea Cadet Corps, by example, are shore facilities.