The Genoa I is used as the standard headsail on many yachts. It overlaps the mast, is sheeted outside the spreaders, and usually has an LP measurement of 150%–160%.
Regardless of the rig, the luff of a Genoa I always extends over the entire forestay length. Apart from free‑flying top drifters, the Genoa I is the largest upwind headsail. Depending on the cloth, cut, and shaping, its range of use extends from calm conditions up to winds of about 15–20 knots.
Beyond this point, the Genoa I becomes too large in terms of sail area. Your yacht heels too much and can no longer be trimmed optimally. Once this happens, it is advisable to switch to the Genoa II.
This headsail is smaller and has a shorter foot (approx. 125%–135% LP). The Genoa II is made from heavier cloth and, with its cut and shaping, is designed for higher wind strengths and waves.
