# Project 2559 — Training Systems and Simulation (TSS)

**Program element:** 0604840N — F-35C C2D2  
**Project:** 2559  
**Component:** U.S. Navy  
**Appropriation:** 1319 — RDT&E, Navy  
**Budget Activity:** 7 — Operational System Development  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/0604840N/2559  
**Parent:** https://hitchintel.com/programs/0604840N

## Summary

Project 2559 — Training Systems and Simulation (TSS) requests $36.0M in FY2027, 8.4% of the $428.5M requested for program element 0604840N, up 12% on FY2026. 3 R-2A activities decompose the request. Lockheed Martin is the largest named R-3 performer at $32.5M, 90% of the project's FY2027 R-3 total.

## Funding profile

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 25.4 |
| FY2026 | Enacted | 32.2 |
| FY2027 | Request | 36.0 |
| FY2028 | Outyear | 30.7 |
| FY2029 | Outyear | 31.6 |
| FY2030 | Outyear | 31.5 |
| FY2031 | Outyear | 32.1 |

> Estimate types are not summed. This project is one leaf of PE 0604840N; the PE total is the sum of its projects, never added to them.

## What project 2559 buys

The F-35 Training Systems & Simulation Program Management Office (TSS PMO) development portfolio is aligned with the program's Continuous Capability Development & Delivery (C2D2) efforts and is organized in three primary lines of effort; Training System Capability Development (TSCD), Training Systems Architecture (TSA) Development, and Joint Simulation Environment (JSE) Development. Training System Capability Development (TSCD): Efforts will continue with a primary focus on alignment of Training System capabilities with other elements of the Air System. Specific efforts will include accelerating development of Block 4 capabilities to equivalent maturity of those in the Air Vehicle, continued development of the Production Runtime Server (PRTS) - Pilot Training Device TR-3 equivalent - to enable Block 4 capabilities, continued development of Live-Virtual-Constructive (LVC) capabilities including Distributed Mission Training (DMT), and appropriate lab infrastructure to enable Training System development. Training Systems Architecture (TSA) Development: Development efforts will continue to focus on modernization of activities outlined in the TSS PMO roadmaps that will target the requirement of bringing higher fidelity training to the warfighter. Specific development and testing efforts focus on software architecture modernization, hardware architecture modernization, and Synthetic Threat Enhancement. Joint Simulation Environment (JSE): Development, integration and testing efforts will continue to focus on keeping F-35 In-A-Box (FIAB) software concurrent with aircraft capabilities and injecting complex threat/sensor models to establish an operationally representative simulation environment required for operational test trial validity, and the completion of Verification, Validation and Accreditation (VV&A) activities for F-35 Block 4 modernization. Efforts will include FIAB development, fidelity and capability upgrades to existing threats/sensors/weapons models, development of new threat/sensor/weapon models, and environment upgrades to enable effective verification of Block 4 capabilities. Efforts will continue toward expansion of JSE capability to F-35 Training Sites. Funding allocations at the project level have historically been subject to change due to the complexity of the F-35 budget structure and cost share ratios.

**R-3 lines of work:** Product Development; Support.

## Named R-3 performers

| Performer | $M | Share of this project's FY2027 R-3 total |
|---|---|---|
| Lockheed Martin | 32.5 | 90% |
| NAWCAD | 3.5 | 9.8% |

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

## Activities (R-2A) — 3

| Activity | FY2025 | FY2026 | FY2027 | Move | Page |
|---|---|---|---|---|---|
| Training Systems Capability Development (TSCD) | 12.3 | 18.9 | 20.2 | +7% | [a0](https://hitchintel.com/programs/0604840N/2559/a0) |
| Joint Simulation Environment (JSE) Development | 7.5 | 8.8 | 11.3 | +29% | [a2](https://hitchintel.com/programs/0604840N/2559/a2) |
| Training Systems Architecture (TSA) Development | 5.6 | 4.5 | 4.5 | +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.

### Training Systems Capability Development (TSCD)

Efforts will continue to support development, integration and test of Block 4 capabilities in the Training System with a focus on accelerating equivalent capability maturity between the Training System and other elements of the Air System and preparing relevant capability upgrades (Pilot Training, Maintainer Training, Instructional…

Full year-by-year narrative: https://hitchintel.com/programs/0604840N/2559/a0

### Joint Simulation Environment (JSE) Development

Efforts will include FIAB development, fidelity and capability upgrades to existing threats/sensors/weapons models, development of new threat/sensor/weapon models, and environment upgrades to enable effective verification of Block 4 capabilities. Efforts will continue toward expansion of JSE capability to F-35 Training Sites and…

Full year-by-year narrative: https://hitchintel.com/programs/0604840N/2559/a2

### Training Systems Architecture (TSA) Development

**FY2027 planned work.** Efforts will continue to support analysis, design, development, integration and test of Block 4 capabilities in the Training System with a focus on accelerating equivalent capability maturity between the Training System and other elements of the Air System and preparing relevant capability upgrades (Pilot Training, Maintainer Training, Instructional Products) for release to the fleet in FY2028. Additionally, F-35 Lightning Integrated Training Environment (FLITE) will complete critical development, integration and test activities to enable the first delivery in FY2028. The Distributed Mission Training (DMT) Program will continue with development activities to ensure DMT can support the US networks and are in-line with overall Air System Capability to include certified Cross Domain Solutions (CDS) to enable fully integrated DMT across the F-35 Services. DMT will ensure the connection of F-35 Pilot Training Devices (PTDs) to customer provided and accredited Wide Area Networks (WAN) to facilitate connecting multiple sites and enabling a virtual training environment in a common synthetic environment for the US Services. Within the Live-Virtual-Constructed (LVC) portfolio, requirements derivation and planning actives for Enhanced Embedded Training will continue to evolve to support the US LVC integrated training environment.

**FY2026 to FY2027 change.** Considering FY2027 mandatory funding in addition to discretionary, the increase from FY2026 to FY2027 is due to TSS PMO ramping up efforts that are critical to delivering training devices to ensure Air System Alignment. TSS PMO will accelerate architecture development activities on the F-35 Lightning Integrated Training Environment (FLITE), which is a critical enabler to delivering Block 4 training capability.

**FY2026 plans — current year.** Efforts will continue to support analysis, design, development, integration and test of Block 4 capabilities in the Training System with a focus on equivalent capability maturity between the Training System and other elements of the Air System and preparing relevant capability upgrades (Pilot Training, Maintainer Training, Instructional Products) for release to the fleet in FY2027. Additionally, F-35 Lightning Integrated Training Environment (FLITE) will continue critical development, integration and test activities with the first delivery expected in FY2028. The Distributed Mission Training (DMT) Program will continue with development activities to ensure DMT can support the US networks and are in-line with overall Air System Capability to include certified and exportable Cross Domain Solutions (CDS) to enable fully integrated DMT across the F-35 Enterprise. DMT will ensure the connection of F-35 Pilot Training Devices (PTDs) to customer provided and accredited Wide Area Networks (WAN) to facilitate connecting multiple sites and enabling a virtual training environment in a common synthetic environment for the US Services. Within the Live-Virtual-Constructed (LVC) portfolio, requirements derivation and planning actives for Enhanced Embedded Training will continue to evolve to support the US LVC integrated training environment.

## 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/0604840N.

## Source & machine access

- **Source:** FY2027 Department of the Navy RDT&E Budget Justification, Exhibits R-2/R-2A/R-3, PE 0604840N project 2559 (PB PB2027).
- **MCP:** `mcp.hitchintel.com` — `budget_get_program_element(pe="0604840N")`.

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