The still-intact aft bilge pump of the Swedish 17th century warship Vasa/ Wasa as seen from the upper gun deck
It was used to pump the water out if the bilge. That is the lowest space on a ship that is directly above the keel. There the leakage water that has penetrated into the hull of the ship collects, which must be pumped out, since it stinks a lot because it does not move, and can soon become too much, endangering the ship.


















