Nautical Term: Hatch coaming
Definition of Hatch coaming
Hatch coaming refers to the raised rim of vertical plating that surrounds a hatchway. This rim serves to prevent the entrance of water into the ship. The upper edge of the hatch coaming forms a sealing surface with the hatch-lid or cover, ensuring that the ship remains watertight.
For example, during a storm at sea, the waves crash against the ship’s hull. Some water manages to seep into the ship through various openings, such as vents or scuppers. However, the hatchways, which provide access to the ship’s cargo holds or engine rooms, are particularly vulnerable to water intrusion. This is where the hatch coaming comes in. By providing a raised rim of vertical plating around the hatchway, the hatch coaming prevents the entrance of water into the ship, ensuring that the cargo remains dry and the engine continues to run efficiently.
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