Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-933 Register 145778 used by US Marine Corps USMC. Aircraft history and location Aircraft History 145778 US Marine Corps 1970-07-22Sikorsky HUS-1, cn 58-933, ff:? del USMC as HUS-1, 145778, unk soc MCAS Beaufort, 22Jul70. Send Updates Use APP to upload photo @ (optional) When Now? / / Send