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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.
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.
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 containers, lumber or project cargoes. [1] Modern open hatch general cargo ships feature advanced designs to enhance efficiency and accommodate diverse cargo types.
Their small size allows Handysize vessels to enter smaller ports to pick up cargoes, and because in most cases they are 'geared' - i.e. fitted with cranes - they can often load and discharge cargoes at ports which lack cranes or other cargo handling systems. Compared to larger bulk carriers, handysizes carry a wider variety of cargo types.
The hatch covers and the edges of the hatch openings, however, tended to warp or get bent in use, destroying the watertight seal. Later vessels had hatch coamings . While this was an improvement, it was not enough to make up for the relatively small size of the hatches: because the sides of the boats curved in, the hatches were not as wide as ...
Some hatch covers were washed over board and she fill with water in a storm. The life-saving ship Larvik was able to get the crew. [28] Cyrus Sears a N3-S-A1, renamed Giannis. In 1964 she caught fire in the engine room on a trip from Constanța, Romania to Skikda, Algeria with timber. The fire spread to the cargo holds and the superstructure.
MacGregor steel hatch cover Robert MacGregor was a British engineer , who, during the 1920s, concerned over unnecessary losses of North Sea colliers , developed the first steel hatch cover. The design was simple and consisted of five articulated leaves that stowed neatly at the end of each hatch.
Hatch coaming (bottom right) on a bugeye. Coaming is any vertical surface on a ship designed to deflect or prevent entry of water. It usually consists of a raised section of deck plating around an opening, such as a cargo hatch. Coamings also provide a frame onto which to fit a hatch cover.