The unmanned surface vessel (USV) Ranger conducts a replenishment-at-sea with the Lewis and Clark-class dry cargo and ammunition ship USNS Charles Drew (T-AKE 10) as the USV Mariner transits nearby during Integrated Battle Problem (IBP) 23.2, Sep. 16, 2023. IBP 23.2 is a Pacific Fleet exercise to test, develop and evaluate the integration of unmanned platforms into fleet operations to create warfighting advantages. (U.S. Navy photo by Mass Communication Specialist 2nd Class Jesse Monford) Cadre of advanced Navy robo-ships transit the Pacific, make first-ever port call in Japan Four uncrewed surface vessels recently transited across the Pacific Ocean via the U.S. Navy’s Integrated Battle Problem 23.2 exercise. Sep 22, 2023 By Brandi Vincent