Sailors tighten a mooring line on the flight deck of the Oliver Hazard Perry-class guided-missile frigate USS Underwood (FFG 36) after pulling in to the port of Callao, Peru, during UNITAS Pacific. Underwood is representing the U.S. Navy during UNITAS PAC and is deployed to Central and South America and the Caribbean in support of Southern Seas 2012. (U.S. Navy photo by Mass Communication Specialist Seaman Frank J. Pikul)