The amphibious assault ship USS Boxer transits the East Sea during Exercise Ssang Yong 2016 March 8, 2016.REUTERS/U.S. Navy/Mass Communication Specialist Seaman Craig Z. Rodarte/Handout via Reuters The USS Boxer dumped fuel into the ocean, which contaminated its own water supply. Military.com reported on Thursday that the 2016 incident left several sailors aboard sick.