This line of ships consisted of the flagship the Konung Gustaf III (with Prince Grand Admiral Duke Carl aboard), the Seraphimerorden (with Gustav III of Sweden aboard) - in the line's center, the Manligheten  ("The Manliness", sister ship of the Dristigheten), the other ships of line, the navy frigates, the frigate Zemire, the 70-gun ship of the line Enigheten ("The Unity"), and three fire barges, used to set fire to enemy ships. Meanwhile, the flotilla protected the naval fleet, on a parallel course further west, nearer the shoreline.
This passage describes a naval formation with various ships, including a flagship, frigates, a ship of the line, and fire barges, all working together for protection and attack. The flotilla was positioned alongside the main fleet, heading towards the shore.