While DSRAs can be canceled or rescheduled to reflect the actual maintenance needs of the craft, planning for the USS Connecticut’s 2021 DSRA-and the DSRA’s expected 149,667 shipyard worker-days-began sometime after the 2018 shipyard visit, suggesting that the Navy had determined the boat needed deeper maintenance. In January 2018, the submarine completed a 56-day continuous maintenance availability on the sub, and, in September 2019, workers at the Puget Sound Naval Shipyard put the finishing touches on 30,200 worker-days of labor to complete a 5.5 month docking continuous maintenance availability. ![]() To the Navy’s credit, outside of the rescheduled DSRA, USS Connecticut has received regular maintenance. Though the exact improvements are classified, Naval Sea Systems Command has previously identified some nineteen major modernization projects for attack submarines, including propulsor upgrades, combat control system upgrades, sonar array and imaging improvements as well as other communications and engineering changes. It is unclear if any of the work in the planned DSRA would have added navigational aids, sensors or other systems that might have helped aid crew situational awareness, preventing the early October mishap. A Seawolf class DSRA, according to a General Dynamics Electric Boat GD newsletter from 2005, is a major project that “involves repairing various components and systems, installing numerous alterations to enhance the ship’s capabilities, inspecting numerous components to ascertain how they are performing, inspecting and re-preserving all external and internal tanks, and replacing several specific major components.”
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