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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.
Patented in 1929, the steel hatch improved ship and cargo safety and had a lasting impact on cargo care. In 1937, to promote and sell his steel hatch covers, Robert MacGregor and his brother Joseph formed MacGregor & Company in Whitley Bay on the north-east coast of England .
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.
A hatch or hatchway is the opening at the top of a cargo hold. The mechanical devices which allow hatches to be opened and closed are called hatch cover. In general, hatch covers are between 45% and 60% of the ship's breadth, or beam, and 57% to 67% of the length of the holds. [4]
A key aspect of container ship specialization is the design of the hatches, the openings from the main deck to the cargo holds. [41] The hatch openings stretch the entire breadth of the cargo holds, and are surrounded by a raised steel structure known as the hatch coaming. [40] [41] On top of the hatch coamings are the hatch covers.
The main hatch cover was secure, but the fore and lazarette hatches were open, their covers beside them on the deck. The ship's single lifeboat was a small yawl that had apparently been stowed across the main hatch, but it was missing, while the binnacle housing the ship's compass had shifted from its place and its glass cover was broken. [47]