DHC-6 Twin Otter takes off at the Airport Bern-Belp in Switzerland. The aircraft carries the registration marks T-741 and is operated by the Swiss Federal Office of Topography. The De Havilland Canada DHC-6-Serie 300 is a twin engined STOL (Short Take-Off and Landing) aircraft, powered by two Pratt & Whitney Canada PT6A-27 turboprop engines.