Reading Time: 4 minutesDifferent to other sailboats, the true Skärgårdskryssare or Square Metre Boat and their successors for cruising are designated by sail area instead of their length or a formula. For example, the 15 stands for the smallest 15 m2 class, the 22 for the 22s, and so on. If the designation number is underlined, as in the above photo of a …