Tortuga VI was a planet, the sixth planet of the Tortuga system, located in the Alpha or Beta Quadrants of the galaxy, outside Federation space.

In 2268, Tortuga VI was a haven for space pirates. That year, USS Enterprise officers James T. Kirk, Spock, Leonard McCoy and Montgomery Scott, having been assigned to recover a stolen dilithium shipment, traveled there while disguised as pirates and made contact with pirate captain Black Jack Nova, who hired them as crewmembers of his ship, the Windjammer. (TOS comic: "The Flight of the Buccaneer")

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