Assertion: destroyer | /r/CapableOf | patrol with the u.s. 6th fleet
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text: Also in 2016, four destroyers patrolling with the U.S. 6th Fleet based in Naval Station Rota, Spain (USS Porter, USS Carney, USS Ross, USS Donald Cook) received self-protection upgrades, replacing a Phalanx CIWS with the SeaRAM close-range ship defense system combining the Phalanx sensor dome with an 11-cell missile launcher.