TMK's DHC-6 Twin Otter is a 19-passenger STOL (Short Takeoff and Landing), highly maneuverable and versatile aircraft developed by de Havilland Canada. It has often been called the most successful aircraft program in Canada's history. The aircraft's fixed tricycle undercarriage, STOL abilities and relatively high rate of climb have made it a successful cargo, regional passenger airliner and MEDEVAC aircraft.