Aviation Boatswain's Mate Airman Timothy Davis prepares to chock and chain an MV-22 Osprey assigned to Marine Medium Tiltrotor Squadron (VMM) 161 as it lands on the flight deck of the the San Antonio-class amphibious transport dock ship Pre-Commissioning Unit (PCU) Anchorage (LPD 23). Anchorage is en route to its namesake city of Anchorage, Alaska, for its commissioning ceremony May 4. (U.S. Navy photo by Mass Communication Specialist 1st Class James R. Evans/Released)