Mercator is a steel-hulled barquentine built in 1932 as a training ship for the Belgian merchant fleet. She was named after Gerardus Mercator (1512–1594), a Belgian cartographer. She was designed by G.L. Watson & Co. and built in Leith, Scotland and launched in 1932. Besides being a training a ship, she was also used, mainly before World War II, for scientific observations, or as ambassador for Belgium on world fairs and in sailing events.