Petty Officer 2nd Class Nicholas Duran, a boatswain's mate, stands shark watch and makes a chopping motion toward the person in the water as the USCGC Kukui (WLB 203) Cutter Boat-Large crew recovers "Oscar" during a man overboard drill near Vava'u, Tonga, March 14, 2016. During a man overboard scenario, the ship's rescue swimmer enters the water from the CB-L and as a safety precaution, a watch is placed to discourage any sharks from swimming toward the people in the water. (U.S. Coast Guard photo by Petty Officer 2nd Class Melissa E. McKenzie/Released)