What the FY2027 request buys
Verbatim from the R-2A exhibit for project 0413 of PE 0603564N. This is the budget justification's own description of work that has not happened yet — the one thing no other level of the budget carries.
In FY 2027, the BBG(X) program will execute the Preliminary Design phase. This phase will mature the Initial Baseline design by developing the initial ship specifications and completing the selection of major system components. The team will focus on accelerating the design timeline through decisive action in support of design maturation. A technical assessment of the system development specification and ship design will be completed to ensure operational requirements can be met. Key outcomes will include determining the ship's major dimensions, margin allocations (space, weight, power, and cooling - SWAP-C), and the locations of major system components. Digital Engineering activities will also continue, focusing on the establishment of the Computer-Aided Design/Product Lifecycle Management (CAD/PLM) environment and related pilot demonstrations. This initiative follows the Common Design CAD/PLM Tool selection that occurred in FY26. The BBG(X) program will collaborate with shipyards to develop a 3D common design product model, which is scheduled for completion during the functional design phase. Hull form model testing will be conducted on a preliminary hull form, with the final hull form set to be determined in FY 2027. Warfare Systems Development and will focus on rapid prototype and integration of the BBG(X) tactical control systems. Specific activities focus on the integration of key systems, sensors, and weapons, including the Integrated Combat System (ICS), SPY-6 Air Missile Defense Radar (AMDR), Vertical Launch Systems (VLS), Mk45 Mod 4 Gun Weapon System, Rolling Airframe Missile (RAM), survivable C4I Suite, and Large Missile Launchers through coordinated hardware and software integration, interface definition, and validation of system performance within the platform's warfare systems architecture. C4I and Aviation activities include maturation of system interfaces, validation of combat system functionality, and integration of unmanned system command (including MUSV) and control capabilities, contributing to the development of an integrated warfare system baseline that ensures interoperability across Combat, C4I, and Aviation domains and enables effective response to current and emerging threats. These efforts support analytical studies and engineering assessments to "design-for; not-with" future warfare systems and capability increments, potentially in the form of BLK or FLT upgrades, including potential integration of Directed Energy Weapons such as Electro-magnetic Railgun (EMRG) and Lasers. Collectively, these activities reduce technical and schedule risk, support design completion, and enable an efficient transition to production aligned with an initial construction window in 2028. IPS risk reduction activities are being accomplished under PE 0603573N / PU 2486.
FY 2026 to FY 2027 increased in the amount of $577.624M due to the transition of FY 2026 DDG(X) PE 0603564N / PU 0411 efforts to FY 2027 BBG(X), PE 0603564N / PU 0413, as well as a result of a FY 2027 expanded scope and accelerated schedule. The condensed construction time is in support of the Golden Fleet shipbuilding plan.
Three years, and no five-year plan
An R-2A activity publishes the prior year, the current year and the budget year. The FYDP outyears exist at project and program-element level and are deliberately absent here rather than inferred. Estimate types are colored and never summed into one figure.
| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 0.0 |
| FY2026 | Enacted | 0.0 |
| FY2027 | Request | 577.6 |
This activity is 99% of project 0413's FY2027 request and 87% of PE 0603564N's. In the request year the activities under a project sum to it exactly; in the current year they under-cover it in about 9% of cases, so an activity's delta can legitimately exceed its parent's and the two must not be compared row to row.
2 activities in project 0413
Every R-2A line of this project, largest FY2027 request first. Linked where the activity has enough of its own narrative to carry a page; the rest are shown in full on the project page.