The Hawk was designed as a specialist training aircraft which would replace the various training types operated by the RAF. The Gnat was useless for weapons training, the Jet Provost was too sedate and the Hunter was too expensive. Therefore the resultant aircraft had to offer safe and sure flying characteristics, a respectable performance, be able to carry a wide range of weaponry, whilst at the same time being economical to operate. The British Aerospace Hawk more than adequately fulfills these requirements, with the type being exported widely, and has also been built under license in modified form as the Goshawk by McDonnell Douglas in the USA.