The ship uses the ANSQ 511 Route Survey payload, which consists of three distinct elements: the towfish handling device - a large crane that sits on the sweep-deck; the towed body or "towfish" that contains the sonar arrays that survey the ocean floor, and is lowered into the water by the crane; and the tactical control unit that remotely operates the towfish and analyzes data from within the ship.
It never actually sailed but was almost completed before the project was cancelled. It was scuttled 1945 then raised by the Soviets and towed to Leningrad and used for target practiceSheerin said:I thought the Graf Zepplin was never completed?