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2. Dorade box - Wikipedia

   en.wikipedia.org/wiki/Dorade_box

   The grey area indicates the deck of the boat. A dorade box (also called a dorade vent , collector box , cowl vent , or simply a "ventilator") is a type of vent that permits the passage of air in and out of the cabin or engine room of a boat while keeping rain, spray, and sea wash out.

3. Scupper - Wikipedia

   en.wikipedia.org/wiki/Scupper

   Scupper: 8. hole (with grille cover), 9. pipe, 10. outlet. There are two main kinds of scuppers: Ships have scuppers at deck level, to allow for ocean or rainwater drain-off. [1] Buildings with railed rooftops may have scuppers to let rainwater drain instead of pooling within the railing. Scuppers can also be placed in a parapet, for the same ...

4. Limber hole - Wikipedia

   en.wikipedia.org/wiki/Limber_hole

   A limber hole is a drain hole through a frame or other structural member of a boat designed to prevent water from accumulating against one side of the frame, and allowing it to drain toward the bilge. Limber holes are common in the bilges of wooden boats. The term may be extended to cover drain holes in floors. Limber holes are created in ...

5. Bilge - Wikipedia

   en.wikipedia.org/wiki/Bilge

   Water that does not drain off the side of the deck or through a hole in the hull, which it would typically do via a scupper, instead drains down into the ship into the bilge. This water may be from rough seas, rain, leaks in the hull or stuffing box, or other interior spillage. The collected water must be pumped out to prevent the bilge from ...

6. Boat building - Wikipedia

   en.wikipedia.org/wiki/Boat_building

   Such a hull has a maximum "hull speed" which is a function of its waterline length. An exception is the catamaran, whose twin hulls are usually so fine that they do not engender a bow wave. Planing hulls: planing hulls have a shape that allows the boat to rise out of the water as the speed increases. Sail boats that plane are typical V-shaped ...

7. Coracle - Wikipedia

   en.wikipedia.org/wiki/Coracle

   Oval in shape and very similar to half a walnut shell, the coracle has a keel-less flat bottom to evenly spread the load across the structure and to reduce the required depth of water; often to only a few inches. This structure helps to make the boat more maneuverable and less likely to snag when used on narrow and/or shallow slow-running ...