# Radar Landing System (RLS) Mod Kit Development

**R-2A activity** of project 3372 — ATC Systems  
**Program element:** 0604504N — Air Control  
**Component:** U.S. Navy · **Budget Activity:** 5  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/0604504N/3372/a0  
**Parent:** https://hitchintel.com/programs/0604504N/3372

## Summary

This activity requests $14.5M in FY2027, 100% of project 3372, up 1.4% 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.** 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 and subsystem testing/redesign. Continued design & development of AN/SPN-35 obsolescence mitigations and completion of preliminary design for most critical obsolescence items (e.g. Main Input/Output Processor (MIOP), and Control-Indicators / Displays).

**FY2026 to FY2027 change.** FY2027 increase of $0.198M due to additional mod kit development efforts on AN/SPN-35 and AN/SPN-46.

## Before the request year

**FY2026 plans — current year.** Design/development of AN/SPN-41 system modifications to implement modified circuit card assemblies (CCAs) and Field-Programmable Gate-Arrays (FPGAs) that replace legacy hardware that is no longer commercially available and that support future SW upgrades required to maintain cyber resiliency. Includes development material procurements and preliminary contractor testing of subsystem modification kits. Legacy system obsolescence and service life assessments will be conducted that review existing system reliability, parts availability and manufacturing sources to inform prioritization of system modifications. Initial design and development work will be conducted for critical obsolescence mitigations and prototype testing will be executed as prototype equipment is available.

## Funding

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 0.0 |
| FY2026 | Enacted | 14.3 |
| FY2027 | Request | 14.5 |

> 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 3372

- AN/SPN-51 Brizo Landing System — FY2027 0.0

## Source & machine access

- **Source:** FY2027 Department of the Navy RDT&E Budget Justification, Exhibit R-2A, PE 0604504N project 3372 (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.*