The Munro cup anemometer and vane have been the basic instrumental method for measuring wind in the UK for many years. Traditionally it has been connected to an anemograph and/or dial, but with the advent of automatic systems it has been attached various processing devices, e.g. the DALE logger. The cup has a large inertia and therefore has a relatively slow response time, but of more concern is the high start-up speed, which in the case of the Mk4 is about 6 knots. In 1998 a project began for the replacement of Munros by a lightweight anemometer with better response characteristics.