Mannheim. Each engine delivers up to 231 kW to a controllable-pitch propeller; the maximal speed is around 10 kn. On the working deck, there is a dry lab and a laboratory for wet work like sorting fish. The ship is equipped with standard sampling devices: You may find on board a demersal trawl, a Van Veen Grab Sampler, Niskin bottles, and even deprecated reversing thermometers for teaching purposes. Mya, Mya II, Aade and Diker The research catamaran Mya was a specially designed for research in the intertidal zone, it could fall dry at low tide. In 2013 it was replaced by the conventional ship Mya II. The main research area is the Wadden Sea and offshore wind farms. Last but not least, there are two small motor boats, Aade and Diker for sampling and diving operations around Heligoland. Aircraft Past aircraft The Alfred Wegener Institute operated five airplanes under the name of Polar, those being: Polar 1, a Dornier 128 commissioned in 1983, now in possession of the TU Braunschweig Polar 2, a Dornier 228 commissioned in 1983, still in service with the AWI Polar 3, like Polar 2 commissioned in 1983, shot down possibly by SA-2 Guideline missile on 24 February 1985 over Western Sahara Polar 4, a Dorniers 228 commissioned in 1985, severely damaged at a landing at the British Rothera Research Station in 2005, now on display at the Institute Current fleet AWI currently uses two Basler BT-67. These planes are 20 m long, 5.2 m high and have a wingspan of 29 m. The empty weight is 7680 kg, with ski landing gear it weighs 8340 kg. The minimal cruising speed is 156 km/h, the maximum is SFA. Without payload, the flying range is around 3900 km. The planes are maintained by the company Kenn Borek Air located in Calgary, Alberta, Canada. Polar 5 The plane hull was built in 1942 but completely refurbished after the AWI acquired the plane in 2007. Since then it "has supplied a large volume of valuable data" said Prof. Heinrich Miller, the former director of the AWI. Polar 6 This plane with the call sign C-GHGF was acquired by AWI in 2011. The BMBF, the German Federal Minister of Education and Research funded the purchase and equipping of the plane with a total of 9.78 million euros. See also Open access in Germany Ocean Frontier Institute, an oceans research centre