Printed from https://fiscalreceipts.com/program/0604610N/ — data as of July 28, 2026. Every figure is citation-backed; see the page online for per-number provenance.
Lightweight Torpedo Development
Budget Figures
FY2026 award data is a partial year — USASpending awards are reported on a rolling basis and the fiscal year does not close until September 30. why partial FY2026 data? →
- FY24
- $172.6M
- FY25
- $94.5M
- FY26
- $100.7M
● actuals (line) · ○ enacted · ◇ request — gaps are editions the program is absent from, never interpolated.
| Series | FY15 | FY16 | FY17 | FY18 | FY19 | FY20 | FY21 | FY22 | FY23 | FY24 | FY25 | FY26 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Actuals | $39.7M | $42.5M | $29.6M | $21.1M | $62.4M | $102.1M | $113.2M | $92.3M | $131.7M | $172.6M | ||
| Enacted | $43.7M | $20.2M | $28.1M | $63.1M | $109.3M | $115.1M | $94.4M | $135.5M | $229.7M | $94.5M | ||
| Request | $20.2M | $28.1M | $95.1M | $148.3M | $146.0M | $94.4M | $142.0M | $229.7M | $137.3M | $100.7M |
blank = series not published for this year; – = absent from that edition.
Asked vs spent: the PB2024 book requested $229.7M for FY2024; the PB2026 book reports $172.6M actually spent — $57.1M below the request.
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
Mission — Advanced Anti-Submarine Lightweight Torpedo
The MK 54 MOD 2 program is continuing incremental development of lethality required to prosecute challenging adversary submarines. FY 2025 funding will be used to complete the POD designs, and receive delivery of the POD hardware and the Technical Data Package (TDPs), and commence development efforts of an Adapter section that enables the assembly of the MOD 2 Forebody sections with the legacy MK 54 MOD 0/1 OTTO Fuel Afterbody. FY 2026 funding will be used to award a contract to an industry Prime, funding the Rapid Prototyping of the INC 1 All-Up-Round (AUR), which combines the MOD 2 Forebody sections with the legacy OTTO Fuel Afterbody. Funding will also be used to conduct INC 1 AUR integration, which will mate POD sections, the new Adapter section, and the legacy OTTO Fuel Afterbody. The program will also continue operational software development and modeling and simulation verification, and continue derisking efforts for INC 2, ensuring the Stored Chemical Energy Propulsion System (SCEPS) Afterbody design is mature and ready for Rapid Prototyping at the commencement of the INC 2 phase.
Mission — HAAWC
The HAAWC development program was cancelled due to the restructuring of the MK 54 MOD 2 program to an incremental approach.
Mission — Lightweight Torpedo Development
The Lightweight Torpedo (LWT) program designs, integrates and tests the MK 54 LWT and supports an incremental developmental acquisition approach combining hardware and Advanced Processor Build (APB) operational software upgrades to enable rapid fielding of improvements to the fleet. The program will focus on common LWT hardware and software architecture enhancements that will provide improvements to the array, warhead, propulsion, and APB software to address capability gaps against challenging adversary submarines and environments. Future APB software builds will utilize common torpedo software to deliver capability and tactics improvements to the MK 54 LWT. The program will also support development of enhanced weapon delivery methods, including the high-altitude launch of the MK 54 from the P-8A Maritime Patrol and Reconnaissance Aircraft (MPRA). The HAAWC development program provides the P-8A MPRA with the ability to release LWTs from high altitude to prosecute enemy submarine threats. Operational Testing (OT) was conducted at the end of FY 2020, and the Commander Operational Test & Evaluation Force (COMOPTEVFOR) report was issued in FY 2021, recommending fielding. Follow-on T&E (FOT&E) was conducted in FY 2022 with updated flight control software and the program delivered the HAAWC capability to the fleet in Q3 FY 2022 with Commander Patrol and Reconnaissance Group (CPRG) declaring Initial Operating Capability (IOC) in Q1 FY 2023. The current HAAWC design was developed to deploy the MK 54 MOD 0/1. The MK 54 MOD 2 is not compatible with HAAWC due to having different mass properties and outer mold line from the MK 54 MOD 0/1 LWT. The HAAWC development program was cancelled due to the restructuring of the MK 54 MOD 2 program to an incremental approach. The MK 54 MOD 1 provides significant performance improvements compared to MK 54 MOD 0 for challenging littoral, shallow water environments and adversary countermeasures. The MOD 1 program is split into 2 increments: Increment 1 focusing on the updated sonar hardware and associated APB 5 common software to provide an improved LWT to the Fleet to replace the MK 54 MOD 0s; Increment 2 is the APB 6 software (SW) only upgrade to fully take advantage of the improved sonar hardware developed under Increment 1, update the platform interface to reduce Fleet Operator workload, and provide new capabilities such as Salvo, terminal homing and Hammerhead improvements. MK 54 MOD 0 weapons will also be upgraded with APB 6 improvements compatible with MOD 0 hardware. The MK 54 MOD 2 program is continuing development to provide lethality against challenging adversary submarines. The MK 54 MOD 2 development program has transitioned to an incremental approach to reduce annual costs, delivering lethality via Increment 1 (INC 1) via a Mid-Tier Acquisition process beginning in FY 2026, followed by significantly improved speed, depth and endurance via Increment 2 (INC 2). The MK 54 MOD 2 development program will complete the Phase I Proof of Design (POD) designs and award a contract funding the Rapid Prototyping of the INC 1 All-Up-Round (AUR), which combines the MOD 2 Forebody with the legacy MK 54 MOD 0/1 Afterbody. The program will continue derisking efforts for INC 2, ensuring the MOD 2 Stored Chemical Energy Propulsion System (SCEPS) Afterbody design is mature and ready for Rapid Prototyping at the commencement of the INC 2 phase.
Mission — Lightweight Hybrid Torpedo
The program designs, integrates and tests the LWT MK 54. The LWT provides performance improvements in shallow water, counter-measure environments. The MK 54 MOD 1 program consists of two increments: (1) Increment 1 consisting of Advanced Processor Build (APB) 5 / Tech Insertion 1 (TI-1); and (2) Increment 2, consisting of APB-6 software upgrade. FY 2026 funding is for continued development of MK 54 MOD 1 Increment 2 APB 6 developmental builds, conducting in-water developmental test runs, and Weapons Analysis Facility (WAF) system testing. FY 2026 funding also for continued development of a Fleet Exercise Section (FES) instrumentation subsystem to be compatible with the MK 54 MOD 1 obsolescence upgraded hardware being produced under BLI 3215. FY 2026 also funds emergent and stop gap capability needs.
Justification
No accomplishments or planned-program narratives in this line's J-book detail — some exhibits carry figures without per-project prose.
Budget Line Items(workbook-cited)
Exhibit R-1
| Account | Org | Type | Amount |
|---|---|---|---|
| Research, Development, Test and Evaluation, Navy | N | FY24 Actuals | $172.6M |
| Research, Development, Test and Evaluation, Navy | N | FY25 Enacted | $94.5M |
| Research, Development, Test and Evaluation, Navy | N | FY25 Total | $94.5M |
| Research, Development, Test and Evaluation, Navy | N | FY26 Disc. Request | $12.6M |
| Research, Development, Test and Evaluation, Navy | N | FY26 Reconciliation | $88.2M |
| Research, Development, Test and Evaluation, Navy | N | FY26 Total | $100.7M |
Budget Details(R-2/P-40 facts)
| Project | All Prior Years | FY24 Actuals | FY25 Total | FY26 Base | FY26 Request |
|---|---|---|---|---|---|
| 1412: HAAWC | $22.8M | $15.1M | $0 | $0 | $0 |
| 3418: Advanced Anti-Submarine Lightweight Torpedo | $395.8M | $143.5M | $81.0M | $0 | $0 |
| 2234: Lightweight Hybrid Torpedo | $437.2M | $14.0M | $13.4M | $12.6M | $12.6M |
| Program Element | $855.7M | $172.6M | $94.5M | $12.6M | $12.6M |
No follow-the-dollar view — this program's awards haven't been crosswalked at high confidence (flows cover 17 of 1741 programs). why coverage is partial? →
Awards
No awards are linked to this program element at high 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.
No research dossier for this program — dossiers cover 50 of 1741 programs, the largest fully J-book-detailed lines by FY2026 requested dollars. why no dossier here? →