Answer: rudders

AnswerCrossword Clue
RUDDERSAircraft guidance devices
RUDDERSShips' steering devices
RUDDERSSteering-system parts
RUDDERSAirplane steering gear.
RUDDERSAirplane parts.
RUDDERSCourse correctors
RUDDERSShips' direction controllers
ruddersflat vertical piece for steering a ship, aircraft, etc.
ruddersRUDDER, a vertical blade used to direct the course of a vessel