Aircraft floats are created in two forms: amphibious, meaning they contain retractable landing gear to allow the aircraft to also use normal hard-surface runways, or “straight floats” that restrict the airplane to the water. Floats can run more than 30 feet in length and are usually found on single-engine airplanes like the Cessna 185, 206 and 208 Caravan, but are also popular with owners of Maules and Piper Cubs. One of the largest float-equipped airplanes is the 19-seat de Havilland Twin Otter, a turboprop that recently morphed into the Viking Twin Otter. Most floats include water rudders at the aft end to assist with steering. Because floatplanes don’t use brakes, the plane begins moving in the water as soon as the engine starts.