Navy Lieutenants Ben Olivas and Chris Bohnker prepare for an air defense exercise during an anti-submarine exercise aboard the guided missile destroyer USS Stockdale during a cruiser-destroyer surface warfare advanced tactical training exercise in the Pacific Ocean, April 20, 2018. Olivas is a surface warfare tactics instructor assigned to Naval Surface and Mine Warfighting Development Center. Bohnker is assigned to the Naval Operational Support Center, Newport, R.I. Navy photo by Petty Officer 2nd Class Amanda A. Hayes