<P> The bilge (IPA: / bɪldʒ /) is the lowest compartment on a ship or seaplane, below the waterline, where the two sides meet at the keel . The first known use of the word is from 1513 . </P> <P> The word is sometimes also used to describe the water that collects in this area . Water that does not drain off the side of the deck or through a thru hull, typically via a scupper, 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 becoming too full and threatening to sink the ship . </P>

Where is the bilge located on a boat