Helicopter Sikorsky MH-60R Seahawk Serial Register 166546 used by US Navy USN. Aircraft history and location Aircraft History 166546 US Navy USN Jan13 HSM-77 /NE-704 Mar14 HSM-71 /NG-701 Oct15 HSM-49 /TX-105 HSM-77 Send Updates Use APP to upload photo @ (optional) When Now? / / Send