Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-948 Register 145780 used by US Marine Corps USMC. Aircraft history and location Aircraft History 145780 US Marine Corps Sikorsky HUS-1, cn 58-948, ff:? del USMC as HUS-1, 145780, unk xfer to Air America as H-22, unk. Send Updates Use APP to upload photo @ (optional) When Now? / / Send