The Draken was a Swedish Draken Class sea-going submarine of 667 tons displacement launched in 1926. The Draken had a top speed of 15 knots surfaced and 9 knots submerged. She carried a complement of 32 and was armed with one 3 inch anti-aircraft gun; one 25 mm anti-aircraft gun and four 21 inch torpedo tubes. Found on http://www.probertencyclopaedia.com/browse/RD.HTM