The Cargo Containment Unit is a device on Zenlil and other C-3800 aircraft that compacts cargo into a smaller, organized space. On Zenlil, the C.C.U. interface is on the third floor with a maintenance crawl space under it connecting the Galley (kitchen) and Hangar Bay on the second floor. The Seeker cannot interact with the C.C.U. until the end of the game. Rook 25 is working on it in the crawl space along with Pawn 7 at the beginning of the game and she stands by the interface at the end of the game.