Deep Sea Cargo Hold Flooding

A seamless 5-second looping cargo hold flooding sound inside a deep-sea metal exploration capsule. Sustain continuous water seeping through hull seams, shallow water moving across the metal floor, occasional soft pressure creaks and squeezed water, with an enclosed dangerous atmosphere. No alarm, no voice, no music, no clear splash and no one-off impact. The final texture must flow smoothly back into the opening with no gap, click or abrupt level change. Keep the sound muffled, underwater and industrial.