190508-N-WF604-236 SOUTH CHINA SEA (May 8, 2019) A civilian mariner aboard the Lewis and Clark-class dry cargo and ammunition ship USNS Richard E. Byrd (T-AKE 4) operates a crane during a replenishment-at-sea with the guided-missile destroyer USS William P. Lawrence (DDG 110), May 8, 2019. Military Sealift Command fleet replenishment dry cargo and ammunition ships provide support to customers via underway and vertical replenishments. (U.S. Navy photo by Mass Communication Specialist 1st Class David Wyscaver/Released)