Gotland Runt Offshore Race is the world´s largest annual offshore race and starts in the center of Stockholm, sails through the Stockholm Archipelago, round the island of Gotland to the finish at Sandhamn. The course is about 350 Nm and was first sailed 1937.

The sailors are competing in different classes according to respite systems ORCi and SRS. All entries must have a ratified measurement certificate and meet the detailed safety regulations.