Helicopter Sikorsky MH-60S Seahawk Serial Register 166357 used by US Navy USN. Aircraft history and location By Ned Harris Aircraft History 166357 US Navy 2013-02-20 A KNJKUSN as HSC-23 /WC-53 at NAF El Centro, Imperial County, CA HSC-23 Send Updates Use APP to upload photo @ (optional) When Now? / / Send