Seaman Pedro Rivera, from Cherryhill, N.J., performs duties as a signalman aboard amphibious transport dock ship USS Mesa Verde (LPD 19) during a replenishment-at-sea with Military Sealift Command fleet replenishment oiler USNS Kanawa (T-AO 196). Mesa Verde sailors and 22nd Marine Expeditionary Unit Marines are participating in a composite training unit exercise (COMPTUEX) in preparation for deployment. (U.S. Navy Photo by Mass Communication Specialist 3rd Class Shannon M. Smith)