KEY POINTS:
• Navy’s prized Seawolf-class attack submarine USS Connecticut will remain out of service until late 2026, over five years after striking an underwater seamount
• Repair timeline has been extended from initial September 2025 estimate due to shipyard capacity constraints and complexity of damage
• Extended absence highlights critical maintenance backlog affecting nearly 40% of U.S. submarine fleet
• Navy faces growing challenges maintaining submarine readiness amid strategic competition with China
The USS Connecticut, one of only three elite Seawolf-class nuclear attack submarines in the U.S. Navy’s arsenal, will not return to operational service until late 2026, according to The War Zone, marking a significant delay from earlier projections that would have seen the submarine rejoin the fleet this fall.
The $3.1 billion submarine has been undergoing extensive repairs at Puget Sound Naval Shipyard in Washington State since suffering severe damage to its bow and lower rudder when it struck an uncharted seamount in the South China Sea on October 2, 2021, as reported by USNI News.
“USS Connecticut (SSN 22) is in Dry Dock at Puget Sound Naval Shipyard & Intermediate Maintenance Facility (PSNS & IMF) in Bremerton, Washington, undergoing an Extended Docking Selected Restricted Availability (EDSRA),” a Navy spokesperson told The War Zone. “Connecticut is expected to return to service in late 2026.”
The collision, which occurred while the submarine was operating at high speed in international waters, injured 11 crew members, though none of the injuries were life-threatening, according to NPR and CNN. The submarine’s nuclear propulsion plant remained unaffected, as confirmed by U.S. 7th Fleet statements.
According to a Navy investigation reported by USNI News, the accident resulted from “a weak command environment and lax attitudes toward the performance of key tasks,” compounded by degraded navigation standards and poor seamanship. The submarine’s commanding officer, executive officer, and chief of the boat were subsequently relieved of duty.
The repair process has proven particularly challenging. According to The War Zone, “Major repairs to the submarine’s bow, sonar, and other underside structure components will be challenging as the Seawolf class is long out of production.” With only three boats ever built, the Navy cannot leverage spare parts from decommissioned submarines of the same class as it has done with other vessels.
Naval News reported in August 2023 that the Navy’s cost estimate for the additional repairs is approximately $80 million, though this figure may increase. Congress had initially approved $40 million for emergency repairs and an additional $10 million for a new bow dome in 2021, according to The War Zone.
The extended timeline reflects broader challenges facing the Navy’s maintenance infrastructure. According to the Congressional Budget Office, the submarine fleet’s size will exceed shipyard capacity to maintain it in 25 of the next 30 years. The Government Accountability Office found that for fiscal years 2012-2018, only 30 percent of Navy maintenance was completed on time, as reported by USNI News.
“Connecticut’s repair saga underscores the Navy’s lack of repair surge capacity,” Diana Maurer, a director of the Government Accountability Office’s defense readiness evaluations, told Bloomberg. “That raises questions about how the Navy would execute battle damage repairs in the event of a conflict.”
The situation is particularly concerning given the strategic importance of the Seawolf class. As reported by The War Zone, these submarines are “exceptionally quiet, fast, well-armed, and equipped with advanced sensor systems.” The boats are utilized for specialized tasks and remain in very high demand.
With the USS Seawolf scheduled to begin its own lengthy maintenance availability at Puget Sound Naval Shipyard in April 2026, returning to service in June 2029 according to Navy budget documents cited by The War Zone, the Navy faces the prospect of having just one operational Seawolf-class submarine—the specially modified USS Jimmy Carter—for an extended period.
The maintenance delays affecting Connecticut are symptomatic of a fleet-wide challenge. According to Proceedings magazine, nearly 40 percent of U.S. attack submarines cannot be deployed because of maintenance delays. As reported by USNI News, the Navy is investing $21 billion over 20 years in its Shipyard Infrastructure Optimization Program to modernize its four public shipyards, some of which date back more than 100 years.
Meanwhile, the Navy’s next-generation attack submarine program, SSN(X), has been pushed back from the mid-to-late 2030s to the early 2040s, according to Defense News, further emphasizing the importance of maintaining the existing fleet.
The protracted absence of USS Connecticut from operational service represents a significant capability gap at a time when submarine warfare capabilities are considered crucial for deterring potential adversaries in the Indo-Pacific region, particularly as tensions with China continue to escalate.
