It was constructed by outlaws on the run from the Galactic Republic, who had crashed their ship on the water-planet. Their space cruiser became the basis for the sea-going vessel, and as more wood-like material was harvested from the ocean-floor, the ship grew to enormous proportions. Several decades after first arriving on Drexel II, the colonists had made their own society on-board the vessel. They would use their Sonic jammer to disrupt any spacecraft that entered the system, causing them to crash and plundering the wreckage.
The city-ship was damaged during the Battle of Drexel, which saw the Dragon Lords victorious against the city-ship-dwellers.
The city-ship was about the same size as Crimson Jack's battlecruiser.