RDT&E Program Element · President's Budget PB2027

Acoustic Search Sensors

PE 0604261N·U.S. Navy·Approp. 1319 — RDT&E·BA5 — System Development & Demonstration
FY2027 Request
$48.9M
Navy · RDT&E
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U.S. Navy requests $48.9M 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 funded it in full. Boeing leads the industry work.

FY2027 Request
$48.9M
▼ 7.0% vs FY2026
FY2026 Enacted
$52.5M
▲ 1.3% vs FY2025
FY2025 Actual
$51.9M
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, the U.S. Navy is requesting $48.9M for Acoustic Search Sensors under RDT&E program element 0604261N, down 7.0% from 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.

2550051.9FY25ACTUAL52.5FY26ENACTED48.9FY27REQUEST52.0FY2853.5FY2953.5FY3054.6FY31
Actual Enacted Request Outyear (FYDP)
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual51.9
FY2026Enacted52.5
FY2027Request48.9
FY2028Outyear52.0
FY2029Outyear53.5
FY2030Outyear53.5
FY2031Outyear54.6
Where it sits

Acquisition lifecycle

This program is funded in RDT&E Budget Activity 5 — System Development & Demonstration.

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 0604261N

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 -7% overall, which can hide much larger swings below.

Congressional action

Congressional marks

Committee marks on the FY2027 request. Adds and cuts are reconciled in conference before they become law.

RequestPresident's Budget
$48.9M
House NDAA (HASC)HASC
$48.9M full · +$0
Senate NDAA (SASC)SASC
$48.9M full · +$0
House Approps (HAC-D)HAC_D
$48.9M full · +$0
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.

Boeing
$9.9M · 20%
Software Development · CPIF
NAWCAD
$8.7M · 18%
Software Development
Where FY2027 funding flowsShare$M
Industry primes45%21.8
Other / unspecified55%27.0
FY2027 request100%48.9
See Boeing's full federal contract ledger members
Program detail

Mission & acquisition strategy

The Anti-Submarine Warfare (ASW) Sensors and Processing project provides tools and methods necessary to maintain maritime superiority by preventing near-peer threat submarines from completing their hostile missions or disrupting the U.S. Navy's ability to control sea lanes of communication. Project 0480 provides funding for Engineering & Manufacturing Development and follow-on Production and Deployment of new and/or improved passive and active air ASW family of systems that enable cuing, search, detection, localization, track, and attack of subsurface targets.

The MAC-E ASW system and associated sonobuoys are fully integrated on the P-8A ASW platform to maintain superiority by preventing near peer threat submarines from completing hostile missions. MAC-E is a development program associated with P-8A Increment 3 that will improve mission effectiveness by significantly increasing the wide area search capability through Engineering Change Proposals (ECPs) to the sonobuoys, aircraft software modifications to reduce clutter and improve processing, and Operator Machine Interface (OMI) improvements to reduce operator workload. USA continues to expand on threat submarine advancements through the introduction of a series of sensor system capability enhancements.

Project 0480, 3224 — ASW Sensors & Proc
  • Product Development
  • Support
  • Test and Evaluation
  • Management Services
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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 0604261N 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 Boeing 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 Department of the Navy RDT&E Budget Justification · Exhibits R-2 / R-3 · PE 0604261N (President's Budget PB2027) — and FY2027 NDAA committee marks, as tracked 2026-07-27.
Suggested citation
HitchAI, "Acoustic Search Sensors (PE 0604261N)," federal budget intelligence, PB2027 vintage. hitchintel.com/programs/0604261N
Machine access
Markdown twin /programs/0604261N.md · MCP mcp.hitchintel.combudget_get_program_element, budget_get_cong_marks
FY2027 Request
$40.6M
▼ 2.7% vs FY2026
FY2026 Enacted
$41.7M
▲ 0.7% vs FY2025
FY2025 Actual
$41.4M
Prior year

ASW Sensors & Proc — one RDT&E project inside PE 0604261N. Congressional marks are recorded on the program element, not on a project.

Project 0480 — ASW Sensors & Proc — requests $40.6M in FY2027, 83% of the $48.9M requested for program element 0604261N. Year over year it falls 2.7% against FY2026.

Funding trajectory

Project 0480 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.

25041.4FY25ACTUAL41.7FY26ENACTED40.6FY27REQUEST44.6FY2845.9FY2946.0FY3046.9FY31
Actual Enacted Request Outyear (FYDP)
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual41.4
FY2026Enacted41.7
FY2027Request40.6
FY2028Outyear44.6
FY2029Outyear45.9
FY2030Outyear46.0
FY2031Outyear46.9
Inside the project

2 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$36.7M
FY2026 enacted$37.0M
FY2027 request$35.9M

Conclude FR-115 DT/OT. Initiate Tactical Open Mission Systems (TOMS) software changes to add the SSQ-145 receiver. Conduct USAB1 DDVLA sonobuoy (SSQ-145) Critical Design Review (CDR).

Read the FY2027 plan →
APB System Qualification Test/Fleet Release. Rapid Capability Insertion (RCI)/Fleet Release for P-8A▼ 1%
FY2025 actual$4.7M
FY2026 enacted$4.7M
FY2027 request$4.6M

System development and AAEMP for P-8A. Support software and hardware integration flight tests, data collection, and analysis for the acoustics program in order to develop updated fleet release software. Continue MAC-E CONOPS, tactics, techniques, and procedure training for P-8A test and continue additional MAC-E fleet introductory…

Project 0480 — every activity in full →
Who's building it

Named performers on project 0480

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.

Boeing
$9.8M · 24%
NAWCAD
$8.4M · 21%
NAVMAR APPLIED SCIENCES
$1.3M · 3.3%
Project detail

What project 0480 buys

The Anti-Submarine Warfare (ASW) Sensors and Processing project provides tools and methods necessary to maintain maritime superiority by preventing near-peer threat submarines from completing their hostile missions or disrupting the U.S. Navy's ability to control sea lanes of communication. Project 0480 provides funding for Engineering & Manufacturing Development and follow-on Production and Deployment of new and/or improved passive and active air ASW family of systems that enable cuing, search, detection, localization, track, and attack of subsurface targets. Smaller and quieter threat submarines drive requirements for continued advancement in ASW sensor capabilities for both open-ocean and littoral environments in order to overcome challenges associated with reduced target acoustic signatures and increased background clutter caused by the water depth, high volume of shipping, and commercial radio frequency interference. Multistatic Active Coherent Enhancements (MAC-E): PE 0604261N funds the incorporation of the capability into the P-8A Acoustic Operating Flight Program (AOFP), integration of the AOFP into the P-8A Mission suite and associated training system and Post Flight Analysis (PFA) tool updates. The remainder of the integration into the P-8A platform is accomplished via PE 0605504N. UnderSea Advantage (USA): USA is the next generation of multistatics. USA incorporates an incremental improvement upon the existing system and will be accomplished via three blocks. The first block (USAB1) adds the Digital DIFAR Vertical Line Array (DDVLA) sonobuoy (SSQ-145) and software modifications to meet required capability performance metrics. USAB1 will be funded in the following manner: Early development and technology maturation efforts are funded under PE 0603254N, and PE 0604261N funds the incorporation of the capability into the P-8A AOFP and integration of the AOFP into the P-8A Mission suite. 0604261N also funds the associated training system and Post Flight Analysis (PFA) tool updates. The remainder of the integration into the P-8A platform is accomplished via PE 0605504N.

R-3 lines of work
  • Product Development
  • Support
  • Test and Evaluation
  • Management Services
FY2027 Request
$8.3M
▼ 23% vs FY2026
FY2026 Enacted
$10.9M
▲ 3.3% vs FY2025
FY2025 Actual
$10.5M
Prior year

High Altitude ASW — one RDT&E project inside PE 0604261N. Congressional marks are recorded on the program element, not on a project.

Project 3224 — High Altitude ASW — requests $8.3M in FY2027, 17% of the $48.9M requested for program element 0604261N. Year over year it falls 23% against FY2026.

Funding trajectory

Project 3224 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.

010.5FY25ACTUAL10.9FY26ENACTED8.3FY27REQUEST7.4FY287.5FY297.5FY307.7FY31
Actual Enacted Request Outyear (FYDP)
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual10.5
FY2026Enacted10.9
FY2027Request8.3
FY2028Outyear7.4
FY2029Outyear7.5
FY2030Outyear7.5
FY2031Outyear7.7
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.

Key Enablers and Sonobuoy Enhancements▼ 23%
FY2025 actual$10.5M
FY2026 enacted$10.9M
FY2027 request$8.3M

FY2027 planned work Perform ACOMMS FR-115 Fleet Introductory Training (FIT). Integrate ACOMMS capability into I3B2. Develop and prototype a digitization solution to SSQ-53 and SSQ-62 sonobuoys.

FY2026 to FY2027 change FY 2026 to FY 2027 decrease is due to ACOMMS DT and P-8A I3B1 SW Corrections of Deficiencies completion.

FY2026 plans — current year Complete P-8A I3B1 ACOMMS DT and SW Corrections of Deficiencies (COD). Implement sonobuoy link availability and assurance improvements to include prototype demonstrations.

Who's building it

Named performers on project 3224

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.

ULTRA MARITIME
$1.9M · 22%
NAWCAD
$0.3M · 3.9%
Boeing
$0.2M · 2.0%
Project detail

What project 3224 buys

Key Enablers and Sonobuoy Enhancements (KESE) provides increased P-8A operational flexibility and effectiveness throughout the kill chain. Funding addresses key enablers such as, uplink/downlink sonobuoy communications assurance, acoustic communications (ACOMMS) on Increment 3 Block 1 (I3B1) aircraft via FR-115 and P8A Increment 3 Block 2 (I3B2) aircraft and sonobuoy enhancements that include: link availability and assurance, cyber protection and the integration into the AOFP software.

R-3 lines of work
  • Product Development
  • Support
  • Test and Evaluation
  • Management Services