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PACIFIC OCEAN (July 12, 2025) – The Los Angeles-class fast-attack submarine USS Santa Fe (SSN 763) and a Japan Maritime Self-Defense Force (JMSDF) submarine steam alongside one another during Submarine Exercise (SUBEX) 25-1 in the Pacific Ocean, July 12, 2025. SUBEX 25-1 was a two-day exercise between the U.S. Navy and JMSDF in the vicinity of Yokosuka to advance joint submarine capabilities and operations. CSG 7 directs forward-deployed, combat capable forces across the full spectrum of undersea warfare throughout the Western Pacific, Indian Ocean, and Arabian Sea. (Photo courtesy of JMSDF.)