Helicopter Sikorsky HH-34F Seahorse Serial 58-1056 Register 1335 H-18 used by Air America ,US Coast Guard USCG. Aircraft history and location Aircraft History For 1335 see also sa341f 1335 tth 1335 1335 US Coast Guard USCG For H-18 see also uh-1d 8714 w/o 2004 H-18 Air America 1963-08aug63 1335 - RLAF Send Updates Use APP to upload photo @ (optional) When Now? / / Send