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Six large cargo hatch covers on a capesize bulk carrier ship as she approaches the Egyptian-Japanese Friendship Bridge. A cargo hatch or deck hatch or hatchway is type of door used on ships and boats to cover the opening to the cargo hold or other lower part of the ship. To make the cargo hold waterproof, most cargo holds have cargo hatch.
Planners can also load a 40 feet container on top of two units of 20 feet container, this known as a "Russian stowage" or "mixed stowage". [21] Hatch cover clearance – Hatch cover clearance refers to how many "High Cube" (height over 8.6 ft (2.6 m)) containers allowed to load in the hold without preventing the hatch cover from closing correctly.
The holds are topped by hatch covers, onto which more containers can be stacked. Many container ships have cargo cranes installed on them, and some have specialized systems for securing containers on board. The hull of a modern cargo ship is a complex arrangement of steel plates and strengthening beams.
Cargo holds are box shaped to fit containers and some holds can be equipped with tweendecks to improve flexibility of cargo mixture in same hold. Holds are typically equipped with dehumidifier for sensitive cargo. Cargo hatch covers for holds are opened and closed by mean of gantry crane. Space on those hatch covers can also be used to carry ...
This is crucial to provide strength. The open hatches are useful for forest products, such as pre-slung timber and logs. The heavy units are more easy to handle than in a conventional bulk carrier. The open hatch bulk carriers can also be used to carry containers on the outward leg, and dry bulk on the return leg. The first open hatch bulk ...
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Butterworth hatches are not the main access hatches, but are the servicing hatches, and are generally closed with a metal cover plate with a gasket that is fastened to the deck by a number of bolts which stick up from the deck. Holes on the edges of the plate fit over these bolts and the cover is fastened down with nuts or dogs.
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