# Submarine Torpedo Defense System (SubTDS)

**R-2A activity** of project 1265 — Sub Defensive Warfare  
**Program element:** 0101226N — Submarine Acoustic War Dev  
**Component:** U.S. Navy · **Budget Activity:** 7  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/0101226N/1265/a0  
**Parent:** https://hitchintel.com/programs/0101226N/1265

## Summary

This activity requests $20.4M in FY2027, 100% of project 1265, up 9.2% on FY2026. The R-2A exhibit describes it across FY2026–FY2027, including what the FY2027 money is planned to buy.

## What the FY2027 request buys

**FY2027 planned work.** -MK5 DT/OT -Continue deliveries of MK5 LRIP units -Continue MK6 Prototype Development

**FY2026 to FY2027 change.** The FY 2026 budget request for the Submarine Defensive Warfare Project 1265 includes $18,664K of discretionary and $8,700K of mandatory (reconciliation) for a total of $27,364K. This FY 2027 budget request represents a decrease of $6,985K from FY 2026 to FY 2027. This decrease is primarily driven by reduced development costs for the ADC MK5 program in FY 2027 and transitioning to DT and OT.

## Before the request year

**FY2026 plans — current year.** -ADC MK5 Production Readiness Review (PRR) -ADC MK5 HWIL (M&S) integration -Deliveries of ADC MK5 LRIP units -MK5 DT/OT -MK5 Iterative Development -MK6 Prototype Development

## Funding

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 16.3 |
| FY2026 | Enacted | 18.7 |
| FY2027 | Request | 20.4 |

> Prior, current and budget year only — an R-2A activity carries no five-year plan. It sums exactly into its project in the request year and not necessarily in any other.

## Other activities in project 1265

- Submarine Tethered Expendable Bouy — FY2027 0.0

## Source & machine access

- **Source:** FY2027 Department of the Navy RDT&E Budget Justification, Exhibit R-2A, PE 0101226N project 1265 (PB PB2027). Narrative is the government's own text.
- **No marks, no contractors at this grain** — congressional marks land on the program element and R-3 performers on the project.
- **MCP:** `mcp.hitchintel.com` — `budget_get_activity`.

*HitchAI is an independent intelligence service, not affiliated with the U.S. Department of Defense. Budget figures are requests/estimates, not obligations.*