CHOCKS AND CHAINS U.S. Navy Seaman Austin Diberardino removes chocks and chains from an MH-60R Seahawk helicopter assigned to Helicopter Marine Strike Squadron 46 during flight quarters aboard the guided missile cruiser USS Gettysburg en route to Scotland, Sept. 19, 2012. The Gettysburg is scheduled to take part in Exercise Joint Warrior, which seeks to improve interoperability between allied navies. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 853098-O-REG52-012.jpg Photo Gallery