With the introduction of one design masts and keels in the IMOCA fleet, teams and their designers have acknowledged that there are few gains to be made over the best boats from the previous generations. Instead, they have opened up a new avenue of development with complex-shaped foils, designed not only to prevent leeway (like conventional daggerboards) but also to improve righting moment (ie adding stability and power) and creating vertical lift to reduce wetted surface area and drag. The latest generation foil-assisted IMOCA 60s don’t fly, but they are certainly less immersed than boats not fitted with these foils. With these developments, so the trend, inspired by the flying America’s Cup catamarans and the popular Moth dinghies, is now extending across to monohulls with the latest IMOCA designs. Similar new generation foils have also been permitted to be used on Proto Minis in the Classe 6.50.