# Project 3372 — ATC Systems

**Program element:** 0604504N — Air Control  
**Project:** 3372  
**Component:** U.S. Navy  
**Appropriation:** 1319 — RDT&E, Navy  
**Budget Activity:** 5 — System Development & Demonstration  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/0604504N/3372  
**Parent:** https://hitchintel.com/programs/0604504N

## Summary

Project 3372 — ATC Systems requests $14.5M in FY2027, 35% of the $41.6M requested for program element 0604504N, up 1.4% on FY2026. 2 R-2A activities decompose the request. NAWCAD is the largest named R-3 performer at $14.0M, 97% of the project's FY2027 R-3 total.

## Funding profile

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 50.6 |
| FY2026 | Enacted | 14.3 |
| FY2027 | Request | 14.5 |
| FY2028 | Outyear | 14.7 |
| FY2029 | Outyear | 15.0 |
| FY2030 | Outyear | 14.4 |
| FY2031 | Outyear | 14.6 |

> Estimate types are not summed. This project is one leaf of PE 0604504N; the PE total is the sum of its projects, never added to them.

## What project 3372 buys

The Navy's Precision Approach and Landing System Capability (PALC) and Landing System Upgrade Program (LSUP) are essential to retain the United States Navy's capability to perform safe and expeditious aircraft landings aboard CVN and LHA/D class vessels during adverse weather and night conditions. The Navy's PALC requirements, originally identified in the 2013 PALC Roadmap, necessitated Life Cycle Extension upgrades to all three legacy precision landing systems; AN/SPN-35, AN/SPN-41 and AN/SPN-46. The 2013 PALC Roadmap and subsequent LSUP block upgrades addressed obsolete technology developed and fielded over 30 years ago. In 2022, an updated PALC Roadmap was approved and planned to field system upgrades needed to provide PALC to both legacy aircraft and the Air Wing of the Future (AWOTF). These upgrades planned to modernize the AN/SPN-35 and AN/SPN-46 Radar Landing Systems (RLS), as well as insert common sub-systems that minimize future sustainment costs. These development efforts were planned to result in the fielding of a new system, AN/SPN-51, that would replace legacy systems; AN/SPN-35, AN/SPN-41, and AN/SPN-46. In Q1 FY 2025, the 2022 PALC Roadmap update and development efforts were rescinded, thus cancelling AN/SPN-51. Cancellation of the development program necessitates continued research and development of legacy system modifications to ensure sustainment consistent with the 2013 PALC Roadmap requirement. Without these efforts, the Navy estimates complete loss of Precision Approach Radar (PAR) and Automatic Carrier Landing System (ACLS) capabilities within 10 years. Successful development and fielding of all capabilities is essential to giving fleet users relevant equipment, compliant with Cyber Security directives and Information Assurance mandates, and authorized for fleet use.

**R-3 lines of work:** Product Development; Support; Test and Evaluation; Management Services.

## Named R-3 performers

| Performer | $M | Share of this project's FY2027 R-3 total |
|---|---|---|
| NAWCAD | 14.0 | 97% |
| DDG | 0.5 | 3.3% |

> Budget-justification contract funding, not obligations. Shares need not reach 100% — unnamed and government work is in the denominator.

## Activities (R-2A) — 2

| Activity | FY2025 | FY2026 | FY2027 | Move | Page |
|---|---|---|---|---|---|
| Radar Landing System (RLS) Mod Kit Development | 0.0 | 14.3 | 14.5 | +1% | [a0](https://hitchintel.com/programs/0604504N/3372/a0) |
| AN/SPN-51 Brizo Landing System | 50.6 | 0.0 | 0.0 | — | — |

> Activities carry the prior, current and budget year only — no five-year plan. In the request year they partition this project exactly; in earlier years they can under-cover it.

### Radar Landing System (RLS) Mod Kit Development

Complete system design of AN/SPN-41 CCA and FPGA upgrades in support of prototype material procurement and build. Development of subsystem test plans ahead of subsequent qualification, ground, and flight testing efforts. Complete preliminary design of AN/SPN-46 Unit 6 and 7 subsystem mod kit supported by component material procurements…

Full year-by-year narrative: https://hitchintel.com/programs/0604504N/3372/a0

### AN/SPN-51 Brizo Landing System

**FY2026 plans — current year.** Previous planned efforts (e.g. Critical Design Review (CDR), SIL updates and continued development of AN/SPN-51) are cancelled in alignment with overarching AN/SPN-51 cancellation.

## What is NOT on this page

Congressional marks, the R-2 mission description and acquisition strategy, the industry vs government split of the whole request, and related program elements are recorded at **program-element** grain — an NDAA mark lands on a PE, never on a project. They are at https://hitchintel.com/programs/0604504N.

## Source & machine access

- **Source:** FY2027 Department of the Navy RDT&E Budget Justification, Exhibits R-2/R-2A/R-3, PE 0604504N project 3372 (PB PB2027).
- **MCP:** `mcp.hitchintel.com` — `budget_get_program_element(pe="0604504N")`.

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