“Our success will be measured by one metric: a larger, more capable fleet—manned and unmanned—ready to defend our homeland and project power globally,” Acting Navy Secretary Hung Cao writes in the foreword to the Navy’s fiscal year 2027 30-year shipbuilding plan, which lays out a target 450-vessel fleet by 2031 and new specifics on unmanned surface and undersea vessels.
The 450-vessel goal: composition and short timeline
The plan’s headline figure is a 450-hull fleet by 2031, composed of 299 warships, 68 auxiliary ships, and 83 unmanned vessels. The document frames that force as a “high‑low mix” in which “high-end platforms remain essential, but they must be complemented by systems that can be produced at volume and adapted in real time.” Footnotes on inventory and funding tables caution that “all items beyond the FYDP are under review by the administration.” The Navy did not submit a fiscal year 2026 shipbuilding plan, making this update the service’s first public, detailed roadmap of quantities and timing for unmanned vessels.
Unmanned surface and undersea plans: numbers, spending, and procurement approach
The Navy requests 47 medium unmanned surface vessels (MUSVs) by 2031, aiming for 72 in the inventory by 2056. The plan notes the service earlier asked industry through a MUSV marketplace proposal whether a contractor “could build five or 10 in FY27.” Bryan Clark of the Hudson Institute said that several vendors now have “mature designs or vessels under construction that they can rapidly move into prototyping,” enabling faster demonstrations and potential serial production.
On the subsea side, the Navy plans $135.8 million in fiscal year 2027 for two unmanned underwater vehicles (UUVs) and $1.1 billion through fiscal year 2031 to procure 16 vessels. Adm. Daryl Caudle, chief of naval operations, emphasized integration in the plan’s opening: “We will field a high-low mix of platforms, integrate unmanned and autonomous systems, increase payload capacity, and ensure the power and digital architecture needed for future weapons and networks.”
Fifteen battleships: BBG(X), costs, and program questions
The plan unexpectedly calls for buying 15 new Trump-class battleships (designated BBG(X)) by 2055, with three of them targeted in the next five years. The report devotes substantial space—876 words—to the rationale, describing the battleship as “designed to provide the fleet with a significant increase in combat power by longer endurance, higher speed, and accommodating advanced weapon systems required for modern warfare,” and asserting roles including “high-volume, long-range offensive fires” and robust forward command and control.
Financial estimates in the plan place the cost of three BBG(X) ships at $43.5 billion through fiscal year 2031, with $1 billion in advanced procurement in fiscal year 2027 and the lead ship to be procured in fiscal year 2028. The plan also notes that making the ship nuclear-powered will add cost beyond those figures.
Eric Labs, a senior naval analyst at the Congressional Budget Office, observed that the plan largely sets aside a next-generation destroyer, DDG(X), in favor of the battleship concept, while retaining production of about two Arleigh Burke destroyers per year and describing the three Zumwalt-class destroyers as “the bridge between existing DDG technologies and the battleship.”
Shipbuilder capacity and distributed construction
Analysts quoted in the report raised immediate questions about industrial capacity and cost. Labs asked who would perform final assembly of a nuclear-powered surface combatant, noting that “the traditional surface-combatant-building builders are not, as of now, nuclear-capable.” He added that one option could be final assembly at Newport News—“which is certified because it builds nuclear-powered aircraft carriers and submarines—but then Newport News is already very, very full with its carrier work and its submarine work.”
The plan calls for a five-fold increase in modular or distributed shipbuilding, raising the share of work performed at distributed sites from roughly 10 percent today to a 50 percent goal. “Modular construction expands production capacity, reduces bottlenecks, and accelerates delivery by leveraging industrial capability across the country,” the report states, arguing distributed digital designs should “enable distributed shipbuilding across multiple yards and suppliers.”
Frigates, costs, and sustainment pressure
The Navy plans to buy four frigates by fiscal year 2031 and to have 66 by fiscal year 2056. The plan notes that a predecessor frigate program was canceled last year amid “ballooning costs and delays,” and that estimated costs for the current frigate are higher than in the last shipbuilding plan. Labs judged the new frigate numbers realistic this time, saying: “The frigate is a realistic cost estimate in the shipbuilding plan. But it was not a realistic cost estimate in the prior Navy shipbuilding plan.”
Cost and sustainment pressures accompany the fleet growth. Bryan Clark warned the battleship envisioned by “the Trump administration” would be more expensive than the plan’s estimates because of nuclear propulsion and integration of new technologies, suggesting the first ship could approach $20 billion and that design and construction timelines would stretch beyond the plan’s implicit pace. Clark also noted sustainment assumptions: “If the fleet is going to expand by about 100 ships (33 percent), I would expect sustainment costs to grow by much more. In practice, this means future Navy leaders will likely need to retire ships or inactivate them to reduce sustainment costs.”
What this means for shipbuilders, policymakers, and naval technologists
- Shipbuilders: Expect pressure to add nuclear-capable assembly or partner with yards that are already certified, while preparing for expanded modular work across multiple sites.
- Policymakers and budget analysts: Will need to reconcile plan estimates with projected sustainment growth and the CBO’s prior estimate that the 2025 plan would cost about $1 trillion for new ship builds; a detailed CBO analysis of the current plan is expected later this year.
- Naval technologists and vendors: Face accelerated demand for mature MUSV prototypes and UUV production, and the potential for new, high-power systems—lasers and electromagnetic launchers—that the plan cites as part of BBG(X) capability mixes.
The Navy’s FY27 shipbuilding plan is ambitious and specific in ways prior editions were not: it ties numbers, timelines, and procurement actions together while flagging significant industrial and budgetary questions. The immediate next steps are already visible in the document—advanced procurement in FY27, lead-ship procurement in FY28, and MUSV buys clustered toward 2031—but the practical answers on who will build nuclear-capable surface combatants and how sustainment costs will be funded remain the central, unresolved decisions implied by the plan.
