Answer: scuppers

AnswerCrossword Clue
SCUPPERSDrainage system of a ship.
SCUPPERSOpenings at the level of the deck for draining water overboard.
SCUPPERSDeck openings
SCUPPERSOpenings on decks for drainage
SCUPPERSDrains on deck
scuppersSCUPPER, to ambush (to attack from a concealed place)
scuppersAn outlet in the side of a building for draining water
scuppersA hole in a ship's side to carry water overboard from the deck