Nautical Term: Collar

Definition of Collar

A collar refers to a ring or a flat plate designed to fit around various structures, such as pipes, masts, girders, or beams. The primary function of a collar is to make various spaces watertight. For instance, in a ship’s engine room, a collar might be used around a pipe carrying seawater to the cooling system. The collar ensures that no water escapes, maintaining the watertight integrity of the engine room.

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