Engineman Fireman Justin Hollis from Fall River, MA, mans a Rigid Hull Inflatable Boat (RHIB) as acting boat engineer during a passenger transfer between the U.S. Navy frigate USS Doyle and guided missile cruiser USS Yorktown (CG 48). The ships and their crew are participating in the 43rd annual UNITAS exercise. UNITAS is the largest multi-national naval exercise conducted with naval forces from the U.S., the Caribbean Sea, and South and Central America. The exercises focus on building multinational coalitions, while promoting hemispheric defense and mutual cooperation. U.S. Navy photo by Photographer's Mate 1st Class Martin E. Maddock.