Sailors standby to handle lines on the foc'sle of the Oliver Hazard Perry-class guided-missile frigate USS Underwood (FFG 36) (foreground) as multi-national ships participating in UNITAS are in various stages of replenishing at sea. UNITAS Atlantic 53-2012 is a combined South America- and U.S. 4th Fleet-sponsored annual exercise that incorporates participants from Brazil, Canada, Colombia, Dominican Republic, Mexico, and the United Kingdom and the United States (host nation). (U.S. Navy photo by Mass Communication Specialist 2nd Class Stuart Phillips/Released)