The Open Sea was a region of space largely devoid of stars in the Centrality, a government rimward of Hutt Space, though it also stretched southward into Wild Space. It contained the ThonBoka—a sack-shaped nebula, whose name could be translated as "StarCave"—and the lost Human colony world Renatasia, one of fourteen colonization projects sponsored by Queen Tasia Valenza of Grizmallt in 3,950 BBY. The Oswaft species nested in the ThonBoka, with the entire Open Sea being their domain.
Freighters that experienced a hyperdrive failure in the Open Sea could remain undiscovered for centuries. By 43 ABY, a few hulks had been discovered and put into use as cautionary examples in the Hosrel system.