Project MX46
$264.4MFY2027 request ▲ 64%Sea Based X-Band Radar Development Support
FY2025 actual$186.4M
FY2026 enacted$161.1M
FY2027 request$264.4M
Product DevelopmentSupport
FY2027 Request
$274.2M
▲ 64% vs FY2026
House approps mark
$264.1M
▼ $10.1M vs request
FY2026 Enacted
$166.8M
In law
Roll-up of 2 projects. Projects are the summable leaves — the PE total is their sum, never added to it.
For fiscal year 2027, Defense-Wide agencies are requesting $274.2M for Sea Based X-Band Radar (SBX) under RDT&E program element 0603907C, up 64% over FY2026. In the FY2027 defense authorization, House approps moved to cut it to $264.1M.
Funding trajectory
Funding profile, FY2025–FY2031
Prior years are actuals, the budget year is the request, and the outyears are the FYDP plan. Estimate types are colored and never summed into one figure.
Actual Enacted Request Outyear (FYDP) House approps mark
| Fiscal Year | Estimate Type | Amount ($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 |
Where it sits
Acquisition lifecycle
This program is funded in RDT&E Budget Activity 4 — Advanced Component Development & Prototypes.
Complete
Research
BA 1–2
Complete
Advanced Technology
BA 3
Current
Prototyping
BA 4
Later
Development & Fielding
BA 5–7
Inside the program element
2 projects roll up into PE 0603907C
Projects are the summable leaves — the PE total is their sum, never added to it. Program elements and projects carry the full five-year plan; activities stop at the budget year. This PE moves 64% overall, which can hide much larger swings below.
Project MD40
$9.8MFY2027 request ▲ 70%Program-Wide Support
FY2025 actual$7.6M
FY2026 enacted$5.8M
FY2027 request$9.8M
Support
Congressional action
The request is contested
Committee marks on the FY2027 request. Adds and cuts are reconciled in conference before they become law.
RequestPresident's Budget
$274.2M
House NDAA (HASC)HASC
$274.2M full · +$0
Senate NDAA (SASC)SASC
$274.2M full · +$0
House Approps (HAC-D)HAC_D
$264.1M −$10.1M · −3.7%
▲ $10.1M chamber gap — unresolved as of 2026-07-27. These are FY2027 authorization marks (NDAA); appropriations and the conference agreement may differ.
Who's building it
Where the FY2027 request goes
Performers named in the R-3 exhibit, resolved into industry, government-lab, and unspecified shares. Budget-justification contract funding, not obligations.
RTX / Raytheon
$131.6M · 48%
CHEROKEE NATION ARMORED SOLUTIONS(CNAS),
$9.7M · 3.5%
| Where FY2027 funding flows | Share | $M |
|---|---|---|
| Industry primes | 52% | 142.5 |
| Government labs & warfare centers | 48% | 131.7 |
| FY2027 request | 100% | 274.2 |
Program detail
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.
Project MX46, MD40 — Sea Based X-Band Radar Development Support
- Product Development
- Support
Ask Hitch
Ask this program element
Answers are generated from the figures on this page — the FY2027 justification exhibits and the marks tracked above — and nothing else is consulted. Confirm any figure against the cited exhibit before you use it externally.
H
Questions this page can answer
How does the FY2027 request compare with FY2026, and what does the five-year plan show?What did House approps do to this request, and what is still unresolved?Which project inside PE 0603907C is growing fastest, and which is shrinking?How is the FY2027 request split between industry and government performers?
This page carries the budget justification and the NDAA marks — nothing else. For what RTX / Raytheon has actually been obligated, the ledger is at hitchintel.com/vendors; for live solicitations, hitchintel.com/opportunities. Both are member surfaces.
Provenance
Cite this page
Sources
FY2027 Office of the Secretary of Defense RDT&E Budget Justification · Exhibits R-2 / R-3 · PE 0603907C (President's Budget PB2027) — and FY2027 NDAA committee marks, as tracked 2026-07-27.
Suggested citation
HitchAI, "Sea Based X-Band Radar (SBX) (PE 0603907C)," federal budget intelligence, PB2027 vintage. hitchintel.com/programs/0603907C
Machine access
Markdown twin
/programs/0603907C.md · MCP mcp.hitchintel.com → budget_get_program_element, budget_get_cong_marksFY2027 Request
$264.4M
▲ 64% vs FY2026
FY2026 Enacted
$161.1M
▼ 14% vs FY2025
FY2025 Actual
$186.4M
Prior year
Sea Based X-Band Radar Development Support — one RDT&E project inside PE 0603907C. Congressional marks are recorded on the program element, not on a project.
Project MX46 — Sea Based X-Band Radar Development Support — requests $264.4M in FY2027, 96% of the $274.2M requested for program element 0603907C. Year over year it grows 64% against FY2026.
Funding trajectory
Project MX46 funding, FY2025–FY2031
Prior years are actuals, the budget year is the request, and the outyears are the FYDP plan. Estimate types are colored and never summed into one figure. Projects carry the full five-year plan; the activities inside them stop at the budget year.
Actual Enacted Request Outyear (FYDP)
| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 186.4 |
| FY2026 | Enacted | 161.1 |
| FY2027 | Request | 264.4 |
| FY2028 | Outyear | 325.6 |
| FY2029 | Outyear | 416.4 |
| FY2030 | Outyear | 394.1 |
| FY2031 | Outyear | 324.8 |
Inside the project
4 accomplishments / planned programs
The R-2A exhibit. Activities carry the prior, current and budget year only — no five-year plan — and they are descriptive: coverage is partial and they do not always add back to the project, so count them, never total them. Opening lines only here — the full year-by-year narrative is on the project page.
Vessel Operations and Support▲ 6%
FY2025 actual$48.6M
FY2026 enacted$72.5M
FY2027 request$76.7M
FY2025 actual$80.7M
FY2026 enacted$80.5M
FY2027 request$140.1M
- Complete initial hardware design of the next generation server architecture required to counter the increased threat vector. - Deliver XBR software build 4.4 formal release. - Initiate MBSE by creating initial models for SBX radar behavior, antenna mount, and functional representation validation. - Initiate SBX GaN TRIMM upgrades to…
Read the FY2027 plan →XBR Radome Replacement
FY2025 actual$13.2M
FY2026 enacted$0.0M
FY2027 request$0.0M
- No funding is requested in FY 2027.
Vessel in-Port Maintenance/Upgrades▲ 488%
FY2025 actual$43.9M
FY2026 enacted$8.1M
FY2027 request$47.6M
- Initiate required maintenance tasks during the major 2027 in-port maintenance period.
Who's building it
Named performers on project MX46
Performers named in the R-3 exhibit under this project. Share is of the project's whole FY2027 R-3 total — the same denominator the program-element split uses, so the two read on one scale and will not sum to 100% when unnamed or government work is in the mix. Budget-justification contract funding, not obligations.
RTX / Raytheon
$131.6M · 50%
STRATEGIC ALLIANCE SOLUTIONS
$0.5M · 0.2%
JACOBS
$0.5M · 0.2%
Veterans
$0.2M · 0.1%
Project detail
What project MX46 buys
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.
R-3 lines of work
- Product Development
- Support
FY2027 Request
$9.8M
▲ 70% vs FY2026
FY2026 Enacted
$5.8M
▼ 24% vs FY2025
FY2025 Actual
$7.6M
Prior year
Program-Wide Support — one RDT&E project inside PE 0603907C. Congressional marks are recorded on the program element, not on a project.
Project MD40 — Program-Wide Support — requests $9.8M in FY2027, 3.6% of the $274.2M requested for program element 0603907C. Year over year it grows 70% against FY2026.
Funding trajectory
Project MD40 funding, FY2025–FY2031
Prior years are actuals, the budget year is the request, and the outyears are the FYDP plan. Estimate types are colored and never summed into one figure. Projects carry the full five-year plan; the activities inside them stop at the budget year.
Actual Enacted Request Outyear (FYDP)
| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 7.6 |
| FY2026 | Enacted | 5.8 |
| FY2027 | Request | 9.8 |
| FY2028 | Outyear | 10.4 |
| FY2029 | Outyear | 15.3 |
| FY2030 | Outyear | 16.1 |
| FY2031 | Outyear | 13.9 |
Inside the project
1 accomplishment / planned program
The R-2A exhibit. Activities carry the prior, current and budget year only — no five-year plan — and they are descriptive: coverage is partial and they do not always add back to the project, so count them, never total them.
Program Wide Support▲ 70%
FY2025 actual$7.6M
FY2026 enacted$5.8M
FY2027 request$9.8M
FY2026 to FY2027 change - Increase from FY 2026 to FY 2027 provides the PWS allocation on a pro-rata basis across multiple Agency PEs each FY based on the total Agency budget and, therefore, fluctuates per PE by FY.
Who's building it
Named performers on project MD40
Performers named in the R-3 exhibit under this project. Share is of the project's whole FY2027 R-3 total — the same denominator the program-element split uses, so the two read on one scale and will not sum to 100% when unnamed or government work is in the mix. Budget-justification contract funding, not obligations.
CHEROKEE NATION ARMORED SOLUTIONS(CNAS),
$9.7M · 99%
Project detail
What project MD40 buys
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.
R-3 lines of work
- Support