The Drifter is a large foresail that is used in light winds - on close-hauled courses up to a maximum of 2 wind speeds , on spacing courses up to a maximum of 4-5 wind speeds. The working area (area in which the sail is used sensibly) lies in a course range from close -hauled courses to half-wind courses , at most room sheet courses . It is driven on the fly like the gennaker or the Code Zero , that is, the luff is only attached (attached) at two points - the head of the sail and the neck of the sail. The sail is usually set and recovered with a furling system , so it is relatively easy to use. Compared to the Code Zero, it has a significantly smaller sail area and a hollow (concave) leech .
- Jeremy Howard-Williams: The Sail . P. 124. Delius Klasing, Bielefeld 1969