The Sillage ranking: each race scores points by its level and the place taken. A class ranking adds up every result in the class; the general ranking, every class together, keeps a skipper's 6 best results.
Each edition of a race has a level in each class, from the Vendée Globe to season races. The winner scores that level's points, the others a share that falls with the place, down to the last paid place; beyond it, and for a retirement, a disqualification or a non-starter, nothing. A small fleet is worth a little less: beating 6 boats is not beating 30.
A race's points count for the season of its arrival. The ranking keeps the last four seasons: the two most recent in full, then 75 % and 50 %. Double-handed, each co-skipper scores the full points; a crewed race scores a little less (the result is shared by a whole crew). On equal points, the most wins comes first, then the best result, then the most recent.