Helicopter Sea Combat Squadron 9 (HSC-9) "Tridents" is a United States Navy helicopter squadron based at Naval Air Station Norfolk, Norfolk, Virginia (USA). The squadron is equipped with the Sikorsky MH-60S Seahawk. Currently, HSC-9 is attached to Carrier Air Wing Eight. It was originally established as Helicopter Anti-Submarine Squadron 3 (HS-3) in 1952 and was redesignated on 1 June 2009.