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Nautical a drain or spout allowing water on the deck of a vessel to flow overboard
A drain on or below the deck of a ship that guides water over or through the side.
1. An opening in a wall or parapet that allows water to drain from a roof.
2. A device placed in such an opening to prevent clogging of the drain.
A recess around the filler neck of an aircraft fuel tank meant to collect any spilled fuel during servicing. This fuel is drained to the ground through a drain line rather than flowed into the aircraft structure.