Lt. Cmdr. Nolan Cain, the Coast Guard Cutter Tahoma’s executive officer, observes a Mexican naval ship execute a UNITAS gunnery shooting exercise of the coast of Colombia during on Sept. 05, 2018. UNITAS is a combined Latin American and U.S. exercise that promotes cooperation, understanding and partnership among the participating navies in order to respond as a unified force to a wide variety of maritime missions.