The DHC-6 Twin Otter With arctic challenges of rough terrain and extreme climatic conditions, Canada provided a unique opportunity for manufacturers, enterprising businessmen and pilots. Following World War II, deHavilland Canada (DHC) made a corporate decision to re-enter the northern bushplane market. Incorporating the needs and preferences put forward by northern pilots, engineers initiated development of the Twin Otter, an aircraft that has had far reaching impact on the development of transportation and communication around the world. Development of the Twin Otter was an evolutionary process. Its predecessor, the DHC-2 Beave