# Sea Based X-Band Radar (SBX) — Program Element 0603907C

**Program element:** 0603907C  
**Component:** Defense-Wide  
**Appropriation:** 0400 — RDT&E, Defense-Wide  
**Budget Activity:** 4 — Advanced Component Development & Prototypes  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/0603907C

## Summary

Defense-Wide funding ramps 64% to a $274.2M request in FY2027, sustained across the five-year plan. In the FY2027 defense authorization, the House funded it in full; the Senate funded it in full; House appropriators cut 3.7% (to $264.1M). RTX / Raytheon leads the industry work, though an unusually large share flows to government labs and warfare centers.

## Funding profile

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 194.0 |
| FY2026 | Enacted | 166.8 |
| FY2027 | Request | 274.2 |
| FY2028 | Outyear | 335.9 |
| FY2029 | Outyear | 431.7 |
| FY2030 | Outyear | 410.2 |
| FY2031 | Outyear | 338.7 |

> Estimate types are not summed — the profile mixes actuals, enacted law, the request, and outyear projections.

## Congressional marks (FY2027)

| Stage | Marked ($M) | Change ($M) |
|---|---|---|
| Request | 274.2 | — |
| House NDAA (HASC) | 274.2 | +0.0 |
| Senate NDAA (SASC) | 274.2 | +0.0 |
| House Approps (HAC-D) | 264.1 | −10.1 |

> FY2027 NDAA authorization marks, as of 2026-07-27. Not appropriations or final law.

## Projects (2)

| Project | Title | FY2025 actual | FY2026 enacted | FY2027 request | Move |
|---|---|---|---|---|---|
| MX46 | Sea Based X-Band Radar Development Support | 186.4 | 161.1 | 264.4 | +64% |
| MD40 | Program-Wide Support | 7.6 | 5.8 | 9.8 | +70% |

> Projects are the summable leaves: the program element total is their sum, never added to it.

### Project MX46 — Sea Based X-Band Radar Development Support

This project provides radar capability development, operations, and support for the SBX radar and its three major sub-systems: self-propelled vessel, X-Band Radar (XBR), and communications network.

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** RTX / Raytheon (131.6, 50%), STRATEGIC ALLIANCE SOLUTIONS (0.5, 0.2%), JACOBS (0.5, 0.2%), Veterans (0.2, 0.1%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Vessel Operations and Support | 48.6 | 72.5 | 76.7 |
| XBR Operations and Support | 80.7 | 80.5 | 140.1 |
| XBR Radome Replacement | 13.2 | 0.0 | 0.0 |
| Vessel in-Port Maintenance/Upgrades | 43.9 | 8.1 | 47.6 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project MD40 — Program-Wide Support

PWS contains non-headquarters management costs in support of Missile Defense Agency (MDA) functions and activities across the entire Missile Defense System. These functions include Government Civilians and Contract Support Services. This effort provides integrity and oversight of the Missile Defense System as well as supports MDA in the development and evaluation of technologies that will respond to the changing threat. Additionally, PWS includes personnel to support global deployments performing deployment site preparation and activation, and provides facility capabilities for MDA Executing Agent locations worldwide. Other MDA wide costs include: physical and technical security; civilian drug testing; audit readiness; the Science, Technology, Engineering, and Mathematics (STEM) program; legal services and settlements; travel and agency training; office, equipment, vehicle, and warehouse leases; utilities and base operations across multiple geographic locations; commercial and ancillary facility services; management of all facility aspects regardless of lifecycle stage; supplies and maintenance; compliance with statutory environmental requirements; data and unified communications support; materiel and readiness and central property management of equipment; Facilities Sustainment, Restoration and Modernization (FSRM) program (formerly Real Property Maintenance) to keep the Department's inventory of facilities in good working order; and similar operating expenses. PWS is allocated on a pro-rata basis across most Agency PEs and, therefore, fluctuates per PE by FY based on the total Agency budget in that FY.

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** CHEROKEE NATION ARMORED SOLUTIONS(CNAS), (9.7, 99%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Program Wide Support | 7.6 | 5.8 | 9.8 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

## Where the FY2027 request goes

| Category | Share | $M |
|---|---|---|
| Industry primes | 52% | 142.5 |
| Government labs & warfare centers | 48% | 131.7 |

**Top named industry performers:** RTX / Raytheon ($131.6M, 48%), CHEROKEE NATION ARMORED SOLUTIONS(CNAS), ($9.7M, 3.5%).

> R-3 exhibit contract funding, not USAspending obligations.

## Mission & acquisition strategy

PWS contains non-headquarters management costs in support of Missile Defense Agency (MDA) functions and activities across the entire Missile Defense System. These functions include Government Civilians and Contract Support Services. This effort provides integrity and oversight of the Missile Defense System as well as supports MDA in the development and evaluation of technologies that will respond to the changing threat. Additionally, PWS includes personnel to support global deployments performing deployment site preparation and activation, and provides facility capabilities for MDA Executing Agent locations worldwide.

The SBX is contractor-operated and maintained through various contracts held by the Missile Defense Agency (MDA), as well as the Navy's Military Sealift Command (MSC). The acquisition strategy for XBR Software development and Contractor Logistics Support was approved by the MDA Director on July 22, 2016, authorizing the MDA to award sole source Indefinite Delivery/Indefinite Quantity (IDIQ) contracts for follow-on development and logistics support to The Raytheon Company.

## Related program elements

- [0604880C — Land Based SM-3 (LBSM3)](https://hitchintel.com/programs/0604880C) (Defense-Wide)
- [0604876C — Ballistic Missile Defense Terminal Defense Segment Test](https://hitchintel.com/programs/0604876C) (Defense-Wide)
- [0204313N — Ship-Towed Array Surveillance Systems](https://hitchintel.com/programs/0204313N) (Navy)
- [0603542N — Radiological Control](https://hitchintel.com/programs/0603542N) (Navy)

## Source & machine access

- **Source:** FY2027 Office of the Secretary of Defense RDT&E Budget Justification, Exhibits R-2/R-3, PE 0603907C (PB PB2027); FY2027 NDAA committee marks (as of 2026-07-27).
- **MCP:** `mcp.hitchintel.com` — `budget_get_program_element(pe="0603907C")`.

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