COAMING

n. raised border that surrounds the opening in a ship deck or roof in order to keep out water

Coaming is any vertical surface on a ship designed to deflect or prevent entry of water. It usually refers to raised section of deck plating around an opening, such as a hatch. Coamings also provide a frame onto which to fit a hatch cover.The protective metal sheeting or plating protecting against water entry into ventilator shafts in large ships is called a coaming as it suits this purpose. In these cases the coaming is usually fitted with a gooseneck as required by Title 46 of the Code of Federal Regulations (CFR). Further regulations for required coamings are available in 46 CFR.
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Noun
1. a raised framework around a hatchway on a ship to keep water out
(hypernym) framework, frame, framing

coaming
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ORLO RIALZATO [INTORNO A UN'APERTURA]. MASTRA DEL BOCCAPORTO [NAUTICA]. BATTENTE DEL BOCCAPORTO [NAUTICA]