The Navys next-generation attack submarine wont be a reality for at least 15 years, according to a new report.The Navys SSN(X) was originally slated to enter production in 2031. That timeline has since slipped to 2035 and now to 2040, due to escalating costs and budget constraints.The Navy requested $623 million in its FY2026 budget to advance the program.This new class is expected to emphasize stealth, intelligence gathering, larger torpedo payloads and advanced connectivity with unmanned undersea systems.INSIDE AMERICAS 6TH-GEN ARSENAL: B-21, F-47, AND THE FUTURE OF AIR DOMINANCEThe report urges lawmakers to consider whether the delay could threaten U.S. undersea dominance and the Navys ability to conduct critical missions.At around 10,000 tons, the SSN(X) is projected to cost between $6.7 billion and $8 billion per vessel, making it significantly more expensive than the Virginiaclass subs its intended to replace.Virginiaclass boats cost approximately $4 billion each and have been in service since 1998. The Navy typically procures two per year, but actual production has slowed to just 1.21.4 subs annually, resulting in a growing backlog of funded but unconstructed boats.NAVY'S CARRIER FLEET FACES TEMPORARY REDUCTION THROUGH 2027 AS NEW SHIPS HIT DEVELOPMENT SNAGSFor FY2025, the Navy requested only one Virginiaclass submarine due to production constraints. Only two U.S. shipyards Electric Boat and Newport News are equipped to build nuclear-powered submarines.The report also encourages lawmakers to examine the impact of deferring production on the industrial base and whether shifting from highly enriched uranium reactors to low-enriched uranium might offer cost or safety advantages.Meanwhile, the Navy aims to grow its fleet from 296 to 381 ships in the coming decades but experts warn that major industrial expansion would be required to reach those targets."We need more ships delivered on time and on budget, and we are challenged in both arenas," said Brett A.Seidle, acting assistant secretary of the Navy for research, development and acquisition, during a Senate Armed Services Committee hearing. "Costs are rising faster than inflation, and schedules on multiple programs are delayed one to three years."TOP HOUSE DEMOCRAT GRILLS HEGSETH ON SUBMARINE SPENDING PLANS: 'GIVE US THE DETAILS'Despite nearly doubling its shipbuilding budget over the past two decades, the Navy has consistently fallen short of its ship-count goals. The Government Accountability Office noted that Navy shipbuilding programs and yards are effectively operating in a "perpetual state of triage."Last month, Rep. RosaDeLauro, DConn., the top Democrat on the Appropriations Committee, pressed Defense Secretary PeteHegseth on his plan to expand shipbuilding capacity."I want your plan. Can we get that in writing and on paper? Because we dont have anything today zip, nada," she said."We have the details," Hegseth responded, "and we will provide them."