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Q5.A. Sketch a watertight door and frame showing the manner of attachment to the bulkhead and the additional reinforcement carried by the bulkhead to compensate for the aperture.
B. Explain how water tightness of the door and frame mating surfaces is ensured with hydrostatic pressure tending to force the faces apart.
C. (i) Describe the means of closing the door;
(ii) State the number of closing stations and the position of each.
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