The DHC-6 Twin Otter is the most successful aircraft program in Canada's history. Development of the aircraft began in 1964. The first aircraft produced were the Series 100s. Later the 200s improved the STOL performance as well as adding a longer nose and reconfigured rear storage compartment. The 300s further increased performance by adding more powerful PT6A-27 engines.
The DHC-6 TwinOtter is a 20-seat STOL feederliner and utility aircraft developed by de Havilland Canada.
TwinOtters could be delivered with floats, skis, or tricycle landing gear direct from the factory, and they became popular bush planes in Alaska and northern Canada.
In Norway, the TwinOtter paved the way for the network of short-field airports, connecting the rural areas with the larger towns with outstanding reliability, and remained in service until 2000 on certain routes.
The TwinOtter is a high-winged, unpressurized, twin-engine turboprop aircraft equipped with color weather radar, radar altimeter, dual GPS/Loran-C navigation systems with scientific data drops, and camera ports in the nose and belly areas.
The TwinOtter is a safe, stable platform for offshore low level marine animal surveys.
In the past, the NOAA TwinOtters have been utilized to assess populations of many species of pinnipeds, cetaceans, fish, and sea turtles.