They squeeze into the maintenance hatch. The shaft is narrow and slick with oil; every step sends echoes through the metal ribs. As they inch along the catwalk, the ship shifts violently—a deep groan, a new leak’s thunderous roar. A support cable snaps above them, sending a cascade of rivulets and a falling bundle of insulated wire. James nearly loses his footing; Elena grabs him, her forearms pressed against his chest to steady him as the bundle swings perilously close.
Look up about the massive water tanks used poseidon 2006 deleted scenes
which showcases the ballroom and lobby sets built both normally and upside down. Poseidon Wiki They squeeze into the maintenance hatch