ATLANTIC OCEAN (April 24, 2009) -Aviation Warfare Specialist 3rd Class Chase Owens keeps lookout from a MH-60S Knight Hawk helicopter while maritime forces from Argentina, Brazil, Canada, Chile, Colombia, Ecuador, Germany, Mexico, Peru, United States and Uruguay sail in formation during the 50th iteration of UNITAS, April 23.Maritime forces are participating in the 50th iteration of the annual multi-national maritime exercise to increase interoperability among participating navies.US Coast Guard Photo by Petty Officer Seth Johnson