Helicopter Sikorsky HSS-1 / SH-34G Seabat Serial 58-118 Register 139020 used by US Navy USN. Built 1955. Aircraft history and location Aircraft History 139020 US Navy 1955-10-15Sikorsky HSS-1, c/n 58-118, ff? del US Navy as HSS-1 139020, 15Oct55 fate unk. Send Updates Use APP to upload photo @ (optional) When Now? / / Send