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PEARL HARBOR, Hawaii – Pearl Harbor Naval Shipyard & Intermediate Maintenance Facility successfully undocked the Los Angeles-class fast-attack submarine USS Topeka (SSN 754) on-time commencing a two-day evolution on July 27, 2021. This undocking is a major milestone in the submarine’s docking selected restricted availability (DSRA). Each undocking is a complex evolution that requires teamwork across the entire shipyard to ensure a safe and on time event.