USNS Supply conducts underway replenishments at sea with the aircraft carrier USS Enterprise and the guided-missile cruiser USS Vicksburg in the Mediterranean Sea. U.S. Navy photo by MC3 Daniel J. Meshel
A guided-missile destroyer pulls alongside MSC dry cargo/ammunition ship USNS Richard E. Byrd during a vertical replenishment. Photo by MC3 Travis Mendoza
MSC tanker USNS Lawrence H. Gianella sails through an icy channel past Mt. Erebus, the southernmost active volcano on Earth, on its way to deliver supplies to McMurdo Station, Antarctica.
MSC hospital ship USNS Mercy sails from a mission stop in Indonesia. U.S. Navy photo by MC2 Roadell Hickman
USNS Joshua Humphreys refuels British Royal Navy destroyer HMS Daring during an underway replenishment in the Gulf of Oman. U.S. Navy photo by MC2 Alex Forster