Maritime Exercise U.S. Navy and Chilean Air Force aircraft participate in a fly-by adjacent to the aircraft carrier USS George Washington during Exercise UNITAS 2105 in the Pacific Ocean, Oct. 20, 2015. UNITAS 2015 is the U.S. Navy's longest running annual multinational maritime exercise, and is part of Southern Seas 2015. U.S. Navy photo by Lt. j.g. David Babka SHARE: Download: Full Size (0.82 MB) Tags: Lead Photos, All images, U.S. Navy Credit: Lt. j.g. David Babka VIRIN: 151021-D-HV319-002.JPG Photo Gallery