PACIFIC OPERATIONS U.S. sailors aboard the amphibious dock landing ship USS Tortuga tend to a Marine Corps CH-53 Sea Stallion helicopter during flight operations in the Pacific Ocean,Sept. 30, 2009. Nearby, the amphibious transport dock USS Harpers Ferry is conducting landing craft, air cushion operations. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 351263-O-KJM00-635.jpg Photo Gallery