In One-Design racing, sailboats compete against other boats in identical boats as defined by their class association, so the first boat over the finish line wins (as opposed to handicap racing, where sailboats of different designs compete against each other, and the winner is determined by calculations involving each boat's individual time, rating and the race course distance).
One-Design racing is a type of sailboat competition where boats are identical, and the winner is determined by who crosses the finish line first.  This differs from handicap racing, which involves comparing boats with different designs and calculating their relative performance based on individual factors like time, rating, and course distance.