What the FY2027 request buys
Verbatim from the R-2A exhibit for project 1162 of PE 0603673N. 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.
UnderSea Advantage Block Upgrade (USABU) - Complete development of a large, low-noise volumetric array that can be deployed in an A-size sonobuoy that will have superior detection performance against relevant targets. - Complete receive sensor array validation and sonobuoy integration. - Complete development of acoustic source array for an A-size sonobuoy that will have increased operational bandwidth. - Complete source array validation and manufacture the second build of the prototype transmit arrays.
The small decrease from FY 2026 to FY 2027 does not reflect a significant change in the investment for this FNC.
FY2026: the year under way
Prior-year accomplishments and current-year plans from the same exhibit. Context for the FY2027 plan, not a series — an activity partitions its project exactly in the request year, but can under-cover it in earlier years.
UnderSea Advantage Block Upgrade (USABU) - Continue development of a large, low-noise volumetric array that can be deployed in an A-size sonobuoy that will have superior detection performance against relevant targets. - Continue receive sensor array validation and sonobuoy integration. - Continue development of acoustic source array for an A-size sonobuoy that will have increased operational bandwidth. - Continue source array validation and manufacture the second build of the prototype transmit arrays.
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 | 11.4 |
| FY2027 | Request | 11.1 |
This activity is 19% of project 1162's FY2027 request and 2.5% of PE 0603673N'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.
12 activities in project 1162
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.