. "K\u00F8benhavn was a Danish five-masted barque used as a naval training vessel until its disappearance after December 22, 1928. Built for the Danish East Asiatic Company in 1921, it was the world's largest sailing ship at the time, and primarily served for sail training of young cadets.The K\u00F8benhavn was last heard from on December 21, 1928 while en route from Buenos Aires to Australia. When it became clear the ship was missing, a lengthy search ensued, but turned up no trace."@en . . "K\u00F8benhavn"@en . . . "Disappeared after 22 December 1928" . "1921-03-24Z"^^ . "131.064"^^ . .