# PAC 3 - MSE Navy

**R-2A activity** of project 1447 — Surf Combatant Combat System Imp  
**Program element:** 0604307N — Surface Combatant Cmbt Sys Eng  
**Component:** U.S. Navy · **Budget Activity:** 5  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/0604307N/1447/a9  
**Parent:** https://hitchintel.com/programs/0604307N/1447

> **NEW START.** $120.6M requested in FY2027 with no prior-year and no current-year funding.

## Summary

This activity requests $120.6M in FY2027, 32% of project 1447 — a new start with no prior-year and no current-year money. The R-2A exhibit describes it across FY2026–FY2027, including what the FY2027 money is planned to buy.

## What the FY2027 request buys

**FY2027 planned work.** COMBAT SYSTEM INTEGRATION: Conduct System Engineering, software engineering, and program management tasks to include develop and review specifications, interface definition, code development, component level testing, element verification, and early system level integration. Provide system engineering efforts required to support the Integrated Product Teams. Program Management Team, System Engineering Cross Product Team, Element, Safety, Configuration Management, Test & Evaluation, Certification, and Subject Matter Experts. Conduct Engineering Technical Reviews, Specification Change, Review, Implementation, and baseline governance boards and Navy Review Team. Support for technical and programmatic meetings in support of In Process Reviews, Software Increment Reviews, Program Reviews, and Test Readiness Reviews as required to support the requirements of each milestone to ensure program success. Conduct and maintain all risk management activities required to identify, mitigate and resolve critical risk that would impact the fielding. Conduct controlled flight test of missile to demonstrate safe egress of the missile from Mk 41 canister and capture seeker data for above-water environment. Conduct hardware-in-the-loop testing at land-based test sites of the combat system logic and missile communication and guidance. Perform system safety analysis and provide briefings to SSSTRP and WSESRB. Perform planning and preparation for guided flight test in early FY28 to demonstrate in-flight control of the missile from a SPY-1 radar. MK-41 VERTICAL LAUNCH SYSTEM (VLS) DEVELOPMENT AND INTEGRATION: Develop MK 41 VLS canister for vertical launching of a PAC-3 MSE. To align with the Munitions Acceleration Council's directive, the development of a MK 41 VLS canister for the PAC-3 MSE is a top priority. This effort involves procuring long-lead items for prototyping to ensure availability for flight testing, followed by canister qualification and ordnance handling demonstrations. All technical data, interface control drawings, and software ECPs will be finalized. The PAC-3 MSE Navy will then be integrated into the MK 41 BLVII software, which will undergo initial testing and certification, and all associated test equipment will be updated. PATRIOT ADVANCE CAPABILITY-3 MISSILE ENHANCEMENTS, INTEGRATION AND TEST: Development of a dual-band radio, Fire Control, and missile software updates will continue for the use of the PAC-3 MSE in a maritime environment. Long lead items will be procured for the prototyping of the dual-band radio and end-fire antenna. In line with the MAC's focus on strengthening the domestic supply chain, long-lead items for test equipment specific to the Navy will also be procured, including a Virtual Operational missile (VOM), Hardware in the loop (HWIL), Dynamic Inert Missiles (DIM), and Inert Operational Missile (IOM). A modeling and simulation environment will be created utilizing the existing US Army infrastructure to maintain commonality between services. Missile emulation testing will be conducted within the combat system to ensure the missile can communicate with the Aegis combat system and the SPY-1 radar. A Critical Design Review and software control boards will be performed for certification. Electromagnetic and HERO testing will be conducted for Navy environments. A flight test is scheduled for the fourth quarter of FY27 to ensure safe egress within the newly developed canister and to test the prototype radio with a SPY-1 radar. These efforts are critical to the broader national security strategy of deterring aggression and maintaining a decisive military advantage.

**FY2026 to FY2027 change.** FY26 to FY27 increases by $6,261M, due to the investment of funding to PAC-3 Missile development, VLS Launcher Changes to hardware and software, and Combat System integration to support new advanced missile.

## Before the request year

**FY2026 plans — current year.** The FY 2026 request for PAC-3 MSE Navy includes $0 thousand of discretionary, $65,000 thousand of mandatory (reconciliation) and $91,154 thousand of mandatory (congressional plus up) for a total of $156,154 thousand. The mandatory and discretionary funds are necessary to fully fund contract requirements for Software Integration, Navy Missile Modification and Mk-41 VLS Adaptation.

## Funding

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 0.0 |
| FY2026 | Enacted | 0.0 |
| FY2027 | Request | 120.6 |

> Prior, current and budget year only — an R-2A activity carries no five-year plan. It sums exactly into its project in the request year and not necessarily in any other.

## Other activities in project 1447

- [BL 10 AEGIS FLT IIA & III DESTROYER CONTINUOUS WARFIGHTER IMPROVEMENTS](https://hitchintel.com/programs/0604307N/1447/a3) — FY2027 112.5
- [BL 9 DESTROYER CONTINUOUS WARFIGHTING IMPROVEMENTS](https://hitchintel.com/programs/0604307N/1447/a2) — FY2027 91.4
- [AEGIS DEVELOPMENT SUPPORT](https://hitchintel.com/programs/0604307N/1447/a0) — FY2027 48.9
- BL 5/7 DESTROYER UPGRADES — FY2027 3.9
- AEGIS CAPABILITY PACKAGE 2024 — FY2027 0.0
- COMBAT SYSTEMS TEST BED (CSTB) — FY2027 0.0
- TASK FORCE CYBER AWAKENING (TFCA) — FY2027 0.0
- COLLABORATIVE IAMD PLANNING PROGRAM (CIPP) — FY2027 0.0
- AEGIS DEVELOPMENTAL TESTING / OPERATIONAL TESTING (DT/OT) — FY2027 0.0

## Source & machine access

- **Source:** FY2027 Department of the Navy RDT&E Budget Justification, Exhibit R-2A, PE 0604307N project 1447 (PB PB2027). Narrative is the government's own text.
- **No marks, no contractors at this grain** — congressional marks land on the program element and R-3 performers on the project.
- **MCP:** `mcp.hitchintel.com` — `budget_get_activity`.

*HitchAI is an independent intelligence service, not affiliated with the U.S. Department of Defense. Budget figures are requests/estimates, not obligations.*