Aircraft other than DC-10s have also suffered catastrophic cargo hatch failures. A cargo hatch is present abaft each mast. Near the forward cargo hatch Spence found boxes of pins and buttons. Unable to fly, Jewel falls out of the plane's open cargo hatch towards the ocean. Another distinguishing feature of Lake vessels versus Ocean vessels is the cargo hatch configuration. In addition, Douglas had chosen a new type of latch to seal the cargo hatch. A power-driven cargo hatch leads from the flight deck to the tank deck.