The Code Zero is an intermediate between a genoa and an asymmetrical spinnaker that is used for sailing close to the wind in light air. Being nearly twice the size of a light No. 1 Genoa and made of much lighter weight material a code 0 is a must for offshore races and long distance cruising. The greatest beneficiaries of these sails are modern boats that do not have overlapping headsails because Code Zero has more than three times sail area of a non-overlapping genoa. Code Zero can be tacked to the bow, or flown off of the spinnaker pole. They are sheeted with a spinnaker sheet and can befine-tuned with a tweaker.