Helicopter Sikorsky MH-60R Seahawk Serial Register 166549 used by US Navy USN. Aircraft history and location Aircraft History 166549 US Navy USN Jan13 HSM-77 /NE-707 HSM-77 2017-04-26HSM-78 /NE-706 w/o 26apr17 on initial takeoff 24m E Guam USS Dewey (DDG 105). Send Updates Use APP to upload photo @ (optional) When Now? / / Send