01 December 2021 U.S. Fleet Oiler Conducts Replenishments-at-Sea, Enhances Interoperability with Australia During Annual Exercise PHILIPPINE SEA - Military Sealift Command’s (MSC) Henry J. Kaiser-class replenishment oiler USNS Big Horn (T-AO198) conducted underway replenishments with partners and allies as part of Annual Exercise (ANNUALEX), in the Philippine Sea, Nov. 21-30...