UNITAS FORMATION Maritime forces from Argentina, Brazil, Canada, Chile, Colombia, Ecuador, Germany, Mexico, Peru, and the United States sail in formation during the 50th anniversary of UNITAS, the U.S. Navy’s longest-running annual multilateral exercise Atlantic Ocean, April 23, 2009. The exercise to aimed at increasing interoperability among participating navies. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 631163-F-FTV86-763.jpg Photo Gallery