PHILIPPINE SEA (Nov. 13, 2020) The Henry J. Kaiser-class fleet replenishment oiler USNS Big Horn (T-AO 198) prepares for an underway replenishment with USNS Tippecanoe (T-AO 199) as part of ship qualification trials. After an extended maintenance period, the trials provide Big Horn critical training opportunities, which help ensure readiness. As fleet replenishment oilers, both Big Horn and Tippecanoe provide underway replenishment of fuel, fleet cargo, and stores to U.S. and international partners' ships operating in the Indo-Pacific Region. (U.S. Navy photo by Christopher Bosch)