UMX Twin Otter BNF Basic with AS3X and SAFEIntroduction De Havilland Canada developed the DHC 6 Twin Otter in 1965. Designed as a rugged STOL (Short Take Off and Landing) commuter aircraft, the Twin Otter carried passengers and cargo into harsh environments like the sub zero Antarctic and the scorching North African desert. Viking Air Limited purchased the Type Certificates for all out of production de Havilland aircraft in 2005 and announced the Viking Series 400 Twin Otter Production Program