Project S0417
$287.0MFY2027 request ▲ 142%Underwater Systems
FY2025 actual$161.7M
FY2026 enacted$118.5M
FY2027 request$287.0M
Product DevelopmentSupportTest and EvaluationManagement Services
FY2027 Request
$351.7M
▲ 179% vs FY2026
FY2026 Enacted
$126.0M
▼ 35% vs FY2025
FY2025 Actual
$194.8M
Prior year
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 $351.7M for Maritime Systems under RDT&E program element 1160483BB, up 179% over FY2026.
Funding trajectory
Funding profile, FY2025–FY2031
Prior years are actuals, the budget year is the request, and the outyears are the FYDP plan. Estimate types are colored and never summed into one figure.
Actual Enacted Request Outyear (FYDP)
| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 194.8 |
| FY2026 | Enacted | 126.0 |
| FY2027 | Request | 351.7 |
| FY2028 | Outyear | 330.4 |
| FY2029 | Outyear | 218.6 |
| FY2030 | Outyear | 203.1 |
| FY2031 | Outyear | 147.5 |
Where it sits
Acquisition lifecycle
This program is funded in RDT&E Budget Activity 7 — Operational System Development.
Complete
Research
BA 1–2
Complete
Advanced Technology
BA 3
Complete
Prototyping
BA 4
Current
Development & Fielding
BA 5–7
Inside the program element
2 projects roll up into PE 1160483BB
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 179% overall, which can hide much larger swings below.
Project S1684
$64.8MFY2027 request ▲ 763%Surface Craft
FY2025 actual$33.1M
FY2026 enacted$7.5M
FY2027 request$64.8M
Product DevelopmentTest and EvaluationManagement Services
Congressional action
Congressional marks
Committee marks on the FY2027 request. Adds and cuts are reconciled in conference before they become law.
RequestPresident's Budget
$351.7M
House NDAA (HASC)HASC
$351.7M full · +$0
Senate NDAA (SASC)SASC
$364.0M +$12.3M · +3.5%
House Approps (HAC-D)HAC_D
$351.7M full · +$0
▲ $12.3M 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.
| Where FY2027 funding flows | Share | $M |
|---|---|---|
| Industry primes | 0.2% | 0.8 |
| Government labs & warfare centers | 0.9% | 3.1 |
| Other / unspecified | 99% | 347.8 |
| FY2027 request | 100% | 351.7 |
Program detail
Mission & acquisition strategy
This Program Element provides for the Engineering and Manufacturing Development (EMD) of Special Operations Forces (SOF) Surface and Undersea Mobility platforms. It also provides for pre-acquisition activities to quickly respond to new requirements for SOF surface and undersea mobility, looking at multiple alternatives to include cross-platform technical solutions, service-common solutions, Commercial-Off-The-Shelf (COTS) technologies, and new development efforts. S4017: The Underwater Systems project provides for the EMD of combat submersibles, SOF combat diving systems, underwater support systems, and underwater equipment.
• The SDV MK 11/SWCS initially used full and open competition with a down select to a single contractor to award prototype development and low-rate initial production. Leveraging sole source Justification and Approval (J&A) production contracts for delivery of production articles MK1106 - MK1110. The full spectrum of contracting activities is being employed for P3I upgrades, using existing contracts, government agencies, and new contracts as appropriate. The SDV MK 11 is a Major Capability Acquisition (MCA) (ACAT III) designated program. • The DDS is currently in sustainment through a maintenance and service contract.
Project S0417, S1684 — Underwater Systems
- Product Development
- Support
- Test and Evaluation
- Management Services
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.
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Questions this page can answer
How does the FY2027 request compare with FY2026, and what does the five-year plan show?What did the FY2027 NDAA committees do to this request?Which project inside PE 1160483BB 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 Apogee 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 1160483BB (President's Budget PB2027) — and FY2027 NDAA committee marks, as tracked 2026-07-27.
Suggested citation
HitchAI, "Maritime Systems (PE 1160483BB)," federal budget intelligence, PB2027 vintage. hitchintel.com/programs/1160483BB
Machine access
Markdown twin
/programs/1160483BB.md · MCP mcp.hitchintel.com → budget_get_program_element, budget_get_cong_marksFY2027 Request
$287.0M
▲ 142% vs FY2026
FY2026 Enacted
$118.5M
▼ 27% vs FY2025
FY2025 Actual
$161.7M
Prior year
Underwater Systems — one RDT&E project inside PE 1160483BB. Congressional marks are recorded on the program element, not on a project.
Project S0417 — Underwater Systems — requests $287.0M in FY2027, 82% of the $351.7M requested for program element 1160483BB. Year over year it grows 142% against FY2026.
Funding trajectory
Project S0417 funding, FY2025–FY2031
Prior years are actuals, the budget year is the request, and the outyears are the FYDP plan. Estimate types are colored and never summed into one figure. Projects carry the full five-year plan; the activities inside them stop at the budget year.
Actual Enacted Request Outyear (FYDP)
| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 161.7 |
| FY2026 | Enacted | 118.5 |
| FY2027 | Request | 287.0 |
| FY2028 | Outyear | 293.4 |
| FY2029 | Outyear | 190.1 |
| FY2030 | Outyear | 176.8 |
| FY2031 | Outyear | 120.3 |
Inside the project
7 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.
Sea, Air, and Land (SEAL) Delivery Vehicle (SDV), Program Number 848RESTART
FY2025 actual$1.1M
FY2026 enacted$0.0M
FY2027 request$5.0M
Continues SDV MK11 SDV P3I efforts, transition Operational Energy Prototype Fund (OEPF) Batlatl (Seal Delivery Vehicle MK11-Li-Ion battery) Project and other MK11 SDV performance enhancement efforts.
Dry Deck Shelter (DDS) Modernization, Program Number 817RESTART
FY2025 actual$6.0M
FY2026 enacted$0.0M
FY2027 request$5.0M
Continues DDS Next requirements/design specification development and Program risk reduction though the execution of a Technology Maturation program. The Technology Maturation Program focuses on mitigating design, production, qualification, and capability risks, ensuring the DDS Next provides reliable state of the art capabilities to the…
SOF Combat Diving (CBDIV)RESTART
FY2025 actual$11.3M
FY2026 enacted$0.0M
FY2027 request$12.1M
Continues extended table development. Finalizes testing of next collective propulsion device and acoustic communications devices. Continues testing of A/O communications devices and finalizes testing of next collective propulsion device. Begins development of Expeditionary Diver Treatment System and Submarine Lock Out Trunk trainer.
Read the FY2027 plan →FY2025 actual$23.5M
FY2026 enacted$0.0M
FY2027 request$13.2M
Continues investments and development/transition of technologies to enable assured access, in support of SOF maritime undersea technology insertion roadmap and aligned to the 2026 National Defense Strategy.
Read the FY2027 plan →Small Unmanned Surface Vehicle (SUSV), Program Number V36RESTART
FY2025 actual$1.9M
FY2026 enacted$0.0M
FY2027 request$2.0M
Finalize LE USV modular payload integration work to support Operational Testing and fielding.
Small Unmanned Underwater Vehicle (SUUV), Program Number 799RESTART
FY2025 actual$1.4M
FY2026 enacted$0.0M
FY2027 request$1.4M
Continues payload, cybersecurity, software development and Carry-On Hardware (COH) certification and vehicle acceptance testing criteria supporting SO-p requirements.
Classified Programs▲ 109%
FY2025 actual$116.6M
FY2026 enacted$118.5M
FY2027 request$248.3M
Details provided under separate cover.
Who's building it
Named performers on project S0417
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.
Apogee
$0.8M · 0.3%
Project detail
What project S0417 buys
This project provides for the Engineering and Manufacturing Development (EMD) of combat underwater submersibles, Special Operations Forces (SOF) combat diving systems, underwater support systems, and underwater equipment. This project also provides for pre-acquisition activities (materiel solutions analysis, advanced component development and prototypes) to respond to emerging requirements. These submersibles, equipment, and diving systems are used by SOF in the conduct of infiltration/extraction, personnel/material recovery, hydrographic/inland reconnaissance, beach obstacle clearance, underwater ship attack, and other missions. The capabilities of the submersible systems, diving systems, and unique equipment provides small, highly trained forces the ability to successfully engage with increased lethality while maximizing survivability of the SOF personnel and equipment.
R-3 lines of work
- Product Development
- Support
- Test and Evaluation
- Management Services
FY2027 Request
$64.8M
▲ 763% vs FY2026
FY2026 Enacted
$7.5M
▼ 77% vs FY2025
FY2025 Actual
$33.1M
Prior year
Surface Craft — one RDT&E project inside PE 1160483BB. Congressional marks are recorded on the program element, not on a project.
Project S1684 — Surface Craft — requests $64.8M in FY2027, 18% of the $351.7M requested for program element 1160483BB. Year over year it grows 763% against FY2026.
Funding trajectory
Project S1684 funding, FY2025–FY2031
Prior years are actuals, the budget year is the request, and the outyears are the FYDP plan. Estimate types are colored and never summed into one figure. Projects carry the full five-year plan; the activities inside them stop at the budget year.
Actual Enacted Request Outyear (FYDP)
| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 33.1 |
| FY2026 | Enacted | 7.5 |
| FY2027 | Request | 64.8 |
| FY2028 | Outyear | 37.0 |
| FY2029 | Outyear | 28.5 |
| FY2030 | Outyear | 26.3 |
| FY2031 | Outyear | 27.2 |
Inside the project
8 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.
FY2025 actual$18.2M
FY2026 enacted$0.0M
FY2027 request$43.5M
Continues the incremental design, development, and production of the CCM Mk2 EDM, to include Government engineering services, test agency support, and industry subject matter expertise.
Read the FY2027 plan →Combatant Craft Heavy (CCH), Program Number 819RESTART
FY2025 actual$1.0M
FY2026 enacted$0.0M
FY2027 request$1.0M
Continues development and integration of C5ISR and survivability enhancements.
FY2025 actual$3.3M
FY2026 enacted$0.0M
FY2027 request$17.8M
Continues ALTPNT capability development; continues the AI/ML data collection study to provide future enhancement to surface crafts; continues further development of the MMS which will integrate current and future system displays into one software suite; Continues unique power and energy capabilities such as hybrid electric propulsion…
Read the FY2027 plan →Combatant Craft Assault (CCA), Program Number 820RESTART
FY2025 actual$1.6M
FY2026 enacted$0.0M
FY2027 request$1.8M
Continues integration and testing of MTMN and modernization efforts to reduce operational risk and ensure agility.
Maritime Precision Engagement (MPE), Program Number 671
FY2025 actual$2.1M
FY2026 enacted$0.0M
FY2027 request$0.0M
Complete integrated development testing, and system demonstration event. Complete engineering support to establish baseline and configuration management control. Complete the final, Baseline 3, Technical Data Package (drawings) for CCM MK2
Special Operations Craft Riverine (SOCR), Program Number 821RESTART
FY2025 actual$0.6M
FY2026 enacted$0.0M
FY2027 request$0.6M
Begin prototype installation of developed C5ISR capabilities (Comms Box, TOCNET, and SEAFLIR and operator station console redesign for improved navigation display.
Combatant Craft Forward Looking Infrared (CCFLIR) Program No. 822
FY2025 actual$0.0M
FY2026 enacted$0.0M
FY2027 request$0.0M
Begin development of Next Generation CCFLIR unit 3 (CCLFLIR 3), initiate government design study. Note: FY 2026 President's Budget included $0.00 million in discretionary funding and $2.031 million in mandatory funding for CCFLIR.
Classified Program
FY2025 actual$6.3M
FY2026 enacted$0.0M
FY2027 request$0.0M
Details provided under separate cover.
Project detail
What project S1684 buys
This project provides for the Engineering and Manufacturing Development (EMD) of combatant craft, combatant craft mission equipment, Pre-Planned Product Improvement (P3I), and technology insertion to meet the unique requirements of Special Operations Forces (SOF). This project also provides for pre-acquisition activities (materiel solutions analysis, advanced component development and prototypes) to quickly respond to new requirements for maritime craft and subsystems, leading to increased lethality and survivability of personnel and equipment. The craft capabilities and unique equipment provide small, highly trained forces the ability to successfully conduct operations associated with SOF maritime missions. The FY 2026 request for Maritime Systems includes $120.745 million of discretionary and $180.813 million of mandatory (reconciliation) funding for a total of $301.288 million.
R-3 lines of work
- Product Development
- Test and Evaluation
- Management Services