ARA Libertad (Q-2) is a steel-hulled, full-rigged, class "A" sailing ship that serves as a school vessel in the Argentine Navy. One of the largest and fastest tall ships in the world, holder of several speed records, she was designed and built in the 1950s by the Río Santiago Shipyard, Ensenada, Argentina. Her maiden voyage was in 1961, and she continues to be a training ship with yearly instruction trips for the graduating naval cadets as well as a traveling goodwill ambassador, having covered more than 800,000 nautical miles (1,500,000 km) across all seas, visited about 500 ports in more than 60 countries, and trained more than 11,000 navy graduates.

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.