Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-911 Register 145770 used by US Marine Corps USMC. Aircraft history and location Aircraft History 145770 US Marine Corps Sikorsky HUS-1, cn 58-911, ff:? del USMC as HUS-1, 145770, unk Send Updates Use APP to upload photo @ (optional) When Now? / / Send