Množina: boatswains
Bosun, ship's officer in charge of crew and equipment; skua. boatswain's chair, seat suspended by ropes for person working on side of ship, building, etc.A petty officer on a merchant ship who controls the work of other seamen; SYN. bos'n, bo's'n, bosun, bo'sun.
ship's crewmember in charge of equipment and maintenance