150419-N-KE519-010 PHILIPPINE SEA (April 19, 2015) Sailors chock and chain a Philippine navy AW109 helicopter during flight operations aboard the amphibious transport dock ship USS Green Bay (LPD 20) during exercise Balikatan 2015. Green Bay, part of the Bonhomme Richard Amphibious Ready Group, is participating in exercise Balikatan 2015. (U.S. Navy photo by Mass Communication Specialist 3rd Class Edward Guttierrez III/Released)