Naval Aviation expands readiness cell to include MH-60R/S helicopters From Commander, Naval Air Force Atlantic Public Affairs | January 26, 2021 Estimated reading time 4 minutes, 45 seconds. Naval Air Force, U.S. Pacific Fleet (AIRPAC), and Naval Air Force Atlantic (AIRLANT) expanded the scope of Naval Aviation’s Maintenance Operations Center (MOC) Jan. 5 to include the MH-60R Seahawk and MH-60S Knighthawk helicopters. Aviation Structural Mechanic 3rd Class Sierra Roper, from Grand Prairie, Texas, left, and Aviation Structural Mechanic 2nd Class Travis Sims, from Brooklyn, Illinois, conduct pre-flight maintenance on an MH-60R Sea Hawk, attached to the Swamp Foxes, of Helicopter Maritime Strike Squadron (HSM) 74, aboard the Arleigh Burke-class guided-missile destroyer USS James E. Williams (DDG 95). U.S. Navy Photo by Mass Communication Specialist 3rd Class Jairus P. Bailey