U.S. Navy Boatswain's Mate 1st Class Johnnie Lowery watches the tides during rough seas as a landing craft unit carrying Marines with the 24th Marine Expeditionary Unit approaches the amphibious assault ship USS Nassau (LHA 4) in the Atlantic Ocean off the coast of Virginia Oct. 28, 2009. The Marines completed a three-week composite unit training exercise aboard the Nassau. (U.S. Navy photo by Mass Communication Specialist Seaman Desiree Green/Released)