Printed from https://fiscalreceipts.com/program/1611/ — built September 26, 2026. Every figure is citation-backed; see the page online for per-number provenance.
Small & Medium UUV
Budget figures
$54.9M discretionary + $66.4M one-time reconciliation. Discretionary change vs FY2025 enacted: +12.5%.
Two official figures, one label— reconciled below
Fiscal Receipts uses P-1/R-1 workbook total obligation authority (TOA) as the headline figure sitewide. The workbook TOA includes budget rows that the R-2/P-40 J-book program line excludes — advance procurement in an ordinary year, and in FY2026 the one-time reconciliation appropriation as well. Each row below names the one it is. How the two bases relate →
FY26 Request · $121.3M TOA − $54.9M J-book line = 66.4M (121.3 − 54.9 = 66.4) — $66.4M of one-time FY2026 reconciliation money accounts for this gap — not advance procurement
Figures in the sentence are rounded for reading; the parenthesised arithmetic is the same subtraction in USD millions, at the precision where it closes.
FY2026 award data is a partial year — USAspending reports awards on a rolling basis, and this corpus runs through 2026-09-04. why partial FY2026 data? →
Budget trajectory
| Fiscal year | Amount |
|---|---|
| FY24 | $56.8M |
| FY25 | $48.8M |
| FY26 | $121.3M |
All series figures: P-1 TOA · PB2026
Decade view
P-1/R-1 workbook TOA basis, shown compact in $B/$M (the workbook records USD thousands); each figure cites its own President's Budget edition
The vertical scale does not start at zero: the baseline sits just below this program’s smallest year, so a low point on this line is not a small amount. Read the shape for direction and the grid below for the figures.
● actuals (line) · ○ enacted · ◇ request — gaps are editions the program is absent from, never interpolated.
| Series | FY22 | FY23 | FY24 | FY25 | FY26 |
|---|---|---|---|---|---|
| Actuals | $44.5M | $49.8M | $56.8M | ||
| Enacted | – | $49.8M | $62.0M | $48.8M | |
| Request | – | – | $62.0M | $48.8M | $121.3M |
blank = series not published for this year; – = absent from that edition.
Asked vs spent: the PB2024 book requested $62.0M for FY2024; the PB2026 book reported $56.8M as actual total obligation authority — $5.14M below the request. 56.815 − 61.951 = -5.136 USD millions — the compact figures above are rounded for reading.
Program lineage
No predecessor/successor lineage was recorded for this program element — no FY-to-FY transfer into or out of this line was stated in the ingested J-books, and none was inferred from the program structure.
Description
Description — Small & Medium UUV
Lionfish and Viperfish are the next generation UUVs that will replace the MK18 Mod 1 and Mod 2 UUVs currently in the fleet. They are the Navy's first cybersecure UUVs, which support mine countermeasures (MCM), Intelligence Preparation of the Operational Environment (IPOE), Subsea and Seabed Warfare (SSW), Naval Special Warfare (NSW) Maritime Homeland Defense (MHLD) and combat salvage. Both provide a critical Detect-to-Engage capability to Expeditionary Mine counter measures (ExMCM) forces, organized into 18 ExMCM companies across the Navy. These UUVs can be used in very shallow to deep waters to clear sea mines and enable fleet movement and maneuver through chokepoints and key water space, enable logistics at sea and between sea and shore in a contested environment, and to enable movement of Marines from ship to shore to seize and hold key terrain in support of Expeditionary Advanced Base Operations. Lionfish is a Small Unmanned Undersea Vehicle (SUUV) that replaces the legacy MK 18 Mod 1, utilizes advanced sensors and autonomy, and can be launched and recovered from small boats and craft, surface ships, vessels of opportunity, submarines, piers and shorelines, and various platforms. Viperfish, the deep water variant of Lionfish, replaces legacy MK 18 Mod 2 UUVs, and leverages recent innovation and technical advances to enable it to be delivered in a Small UUV form factor using Lionfish as a baseline as an ECP with enhanced depth performance and mission capability. P5 / 5N001 KNIFEFISH (SMCM UUV w/LFBB)]: The Knifefish Surface Mine Countermeasure Unmanned Undersea Vehicle (SMCM UUV) program procures Unmanned Undersea Vehicles to support clandestine mine detection capability against volume and bottom mines including buried mine detection. The Knifefish system is composed of two UUVs, batteries, launch and handling system, and other support equipment. P5 / 5N100 TETRA: TETRA is a Remotely Operated Vehicle (ROV) with the capacity for multiple mission payloads as a key enabler to Subsea and Seabed Warfare (SSW) as identified in the SSW Initial Capabilities Document (ICD). A single TETRA system is comprised of 2 ROVs equipped with mission-dependent payload(s) and Ancillary Equipment [P5 / 5N001 KNIFEFISH (SMCM UUV w/LFBB)]: The Knifefish Surface Mine Countermeasure Unmanned Undersea Vehicle (SMCM UUV) program procures Unmanned Undersea Vehicles to support clandestine mine detection capability against volume and bottom mines including buried mine detection. The Knifefish system is composed of two UUVs, batteries, launch and handling system, and other support equipment. Beginning in Fiscal Year (FY) 2020, Knifefish (SMCM UUV) was moved from OPN Line Item (LI) 2622 into OPN LI 1611. [P5 / 5N220 MEDUSA]: Mining Expendable Delivery Unmanned Submarine Asset (MEDUSA) is a medium class UUV capable of offensive mining capabilities deployed from a submarine. MEDUSA features a torpedo tube launch capability, long range, high payload placement accuracy, and can be integrated with heavy payloads. The MEDUSA system is composed of an integrated UUV and payload system, afloat submarine support hardware, and ashore support hardware. [P5 / 5N210 Razorback MK19]: Razorback: A part of the Family of UUVs, Razorback is a medium class UUV capable of persistent, autonomous, ocean sensing and data collection in support of Navy Intelligence Preparation of the Operational Environment (IPOE) mission. The Razorback has two variants, the Razorback MK19, formerly referred to as Razorback Dry Deck Shelter (DDS), and the Razorback MK20, formerly referred to as Razorback Torpedo Tube Launch and Recovery (TTL&R). The Razorback MK19 variant procurement began in FY 2017 and Fleet operational deployments began in FY 2021. Development of requirements and submarine integration efforts commenced in FY 2019 for MK20 variant, which was competitively sourced to industry in FY 2022. On 10 February 2025, the Navy decided to terminate the MK20 program due to significant schedule delays and inability to meet key requirements.
Justification
Justification — Small & Medium UUV
The FY 2026 request for Small and Medium Unmanned Undersea Vehicles (UUV) includes $54,854 thousand of discretionary funds and $66,421 thousand of mandatory (reconciliation) for a total of $121,275 thousand. The mandatory funds unmanned underwater vehicle production. Further information for this reconciliation request is provided in Section 20002 (Shipbuilding) of the Reconciliation Exhibit. The FY 2026 request was reduced by $0.177 million for Advisory and Assistance Services to promote efficiencies and advance the policies of the Administration in alignment with Executive Order 14222, "Implementing the President's Department of Government Efficiency Cost Efficiency Initiative." The FY 2026 request was reduced by $0.600 million for civilian personnel to optimize the workforce in compliance with Executive Order 14210, "Implementing the President's Department of Government Efficiency Workforce Optimization Initiative." FY 2026 funding is required for the next generation of Small Class Unmanned Undersea Vehicles (Lionfish) along with procurement of Mission Support Equipment for the Lionfish systems. CE 3.1.1 LIONFISH (SUUV): This increase allows for the procurement of an additional 10 UUVs in FY 2026. These additional UUVs ensure ExMCM companies will be outfitted with UUVs in order to conduct their primary mission of expeditionary mine countermeasures. CE 3.1.3 LIONFISH ASP (FLS): FY 2026 LIONFISH (SUUV) procurement of 9 sensor packages. Current procurement profile provides increased capability to INDOPACOM consistent with requirements and required delivery schedules. CE 3.1.5 LIONFISH MSE: Procurement quantities of 4 units in FY 2026 for a favorable UUV step ladder pricing. CE 6.1.1 - 6.1.4 MEDUSA increase in FY 2026 to procure long lead materials to accelerate production in FY 2027. Submarine support equipment procurements will include required hardware to integrate MEDUSA onboard the Submarine platform, Ordnance Handling Equipment, and Shipping Containers. Production support will be for Government systems engineering, contractor support, and to procure vehicle training hardware, spare parts, and upgrades. MEDUSA Payload modernization and training equipment will update legacy mine payloads for testing and fleet training. CE 5.1.1 TETRA: Increase in FY 2026 to fund 3 Remotely Operated Vehicles (ROV) and 1 TETRA System Shipset per year across the FYDP. Each TETRA System Shipset contains a mission-dependent payload package and payload ancillary equipment. CE 8.1.1 Razorback MK19 4 Upgrades/Backfits
Budget line items(workbook-cited)
P-1/R-1 workbook Total Obligation Authority basis (USD thousands) · PB2026.
Exhibit P-1
| Account | Org | Type | Amount |
|---|---|---|---|
| Other Procurement, Navy | N | FY24 Actuals | $56.8M |
| Other Procurement, Navy | N | FY25 Enacted | $48.8M |
| Other Procurement, Navy | N | FY26 Disc. Request | $54.9M |
| Other Procurement, Navy | N | FY26 Reconciliation | $66.4M |
| Other Procurement, Navy | N | FY26 Total | $121.3M |
Budget Details(R-2/P-40 facts)
J-book detail basis (R-2/P-40, USD millions) · PB2026 — a different accounting basis from the P-1/R-1 workbook TOA above; where the two disagree, the reconciliation strip under Budget figures shows both.
Wider than this screen — swipe the table sideways for the remaining fiscal-year columns.
| Project | All Prior Years | FY24 Actuals | FY25 Total | FY26 Base | FY26 Request |
|---|---|---|---|---|---|
| Program Element | $160.4M | $56.8M | $48.8M | $54.9M | $54.9M |
Follow the dollar
No follow-the-dollar view — this program's awards haven't been crosswalked at high confidence (flows cover 312 of 1,938 programs). why coverage is partial? →
Awards
No awards are linked to this program element at high or medium confidence — the budget→award crosswalk only asserts links it can defend, and this line has none yet.
Lobbying mentions
No Senate LDA lobbying filing in the tracked data mentions this program element by code or alias.
Oversight
Department-level designation (not specific to this program)
GAO lists 5 high-risk areas for DOD as a whole. That designation covers the department, not Small & Medium UUV. No program-specific GAO finding for this line is in the ingested data. See the DOD oversight record.
Program dossier
No research dossier for this program — dossiers cover 50 of 1,938 programs, the largest fully J-book-detailed lines by FY2026 requested dollars. why no dossier here? →
Primary sources
Open any budget figure for its exact receipt. Verified line items lead with the highlighted government PDF; original spreadsheets download with their budget edition and exhibit in the filename.
Budget totals · TOA sources
FY2026 Department of Defense Budget: Procurement Programs (P-1) · comptroller.war.gov
Exhibit P-1 · O658
Complete workbook · unchanged saved copy. Saves as PB2026_DoD_P-1_Procurement.xlsx.
FY2024 Department of Defense Budget: Procurement Programs (P-1) · comptroller.war.gov
Exhibit P-1 · O643
Complete workbook · unchanged saved copy. Saves as PB2024_DoD_P-1_Procurement.xlsx.
FY2025 Department of Defense Budget: Procurement Programs (P-1) · comptroller.war.gov
Exhibit P-1 · O671
Complete workbook · unchanged saved copy. Saves as PB2025_DoD_P-1_Procurement.xlsx.
Detailed budget justification
The related TOA spreadsheets above use a different accounting basis from R-2/P-40 detail. Their amounts are not assumed to match these detailed sources.