scuppers

The Oxford Companion to Ships and the Sea | 2006 | 478 words | Copyright

scuppers, draining holes, also known as freeing ports, cut through the bulwarks of a sailing ship on the waterways to allow any water on deck to drain away down the ship's side. Scupper shutters were flaps fitted over the outboard side of the scuppers and hinged on the top so that the pressure of water inboard will swing them open while water pressure outside the ship will keep them firmly closed. Pipes led internally to drain water off the deck are known as scupper pipes.

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