- It is a kind of Ship Equipment.
Manual Hatches: They are hinged, pressure-tight doors secured by a handwheel and extending bars. They are not automatic and have no interaction with the ship's computer, though sensors may be placed to tell the computer whether the hatch is open or closed.
A manual hatch cannot be opened if a major pressure differential exists between compartments on either side of it.
- An Iris Valve, Manual Hatch, and a Sliding Door on a horizontal plane.
- An Lift Shaft, Manual Hatch, and Iris Valve on the vertical plane.
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|Late Key Diagram||Early Key Diagram|
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