230406-N-GR655-0162 GROTON, Connecticut (April 6, 2023) – Capt. Jason Grizzle, commodore of Submarine Squadron (SUBRON) FOUR, departs the USS North Dakota (SSN 784) following a change-of-command ceremony in Groton, Connecticut, Aug. 12, 2022. Grizzle relieved Capt. John Strafford during the ceremony. Submarine Squadron (SUBRON) FOUR’s primary mission is to provide fast-attack submarines that are ready, willing, and able to meet the unique challenges of undersea combat and deployed operations in unforgiving environments across the globe.

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