What project 0236 buys
The AN/BYG-1 is the combat control system common across all submarine platforms which incorporates tactical control, weapon/payload control and Tactical Local Area Network (TacLAN) functions into a single procurement program. AN/BYG-1 allows the submarine to rapidly update the ship-safety tactical picture, integrates the common tactical picture into the battlegroup, improves torpedo interfaces, and provides tactical TOMAHAWK, Harpoon, and future payload capability. AN/BYG-1 systems will be continuously updated with hardware enhancements to address Commercial Off The Shelf (COTS) obsolescence and provide capability improvements through software upgrades. Hardware updates are referred to as Tech Insertion (TI) kits and are differentiated by year of development (i.e. TI-22, TI-24, TI-26, etc.). The TI upgrades provide the baseline for all future AN/BYG-1 procurements. AN/BYG-1 is part of the Submarine Warfare Federated Tactical Systems (SWFTS), a family of interdependent systems that conduct cooperative system development and installations. Project Unit 0236: This program develops Commercial-Off-The-Shelf (COTS) based software and hardware upgrades for AN/BYG-1, the Multi-tube Weapons Simulator (MTWS), and the Common Weapon Launcher (CWL) in order to integrate improved tactical and payload control capabilities for all submarine classes. TacLAN provides the infrastructure for connectivity within AN/BYG-1 as well as connectivity to other subsystems attached to TacLAN. It is a local area network backbone for tactical systems on a submarine, including a link to radio for communications off-hull. It enables a submarine to share a common operational picture among systems aboard, and with external platforms. Modifications and improvements to TacLAN are necessary to enable new capabilities requiring network connectivity on BYG-1 and other tactical systems and to improve the submarine's cyber security posture. New capabilities to the Information Assurance (IA) subsystem enhance the centralized solution for cyber security (inclusive of antivirus, access control, intrusion detection and more) and classified information protection (inclusive of posture transition, system downgrade, cross domain solutions and more) onboard all submarines. Modifications to IA are necessary to enable new capabilities on other tactical submarine systems.
- Product Development
- Support
- Test and Evaluation
- Management Services
Project 0236 funding, FY2025–FY2031
Prior years are actuals, the budget year is the request, and the outyears are the FYDP plan. Estimate types are colored and never summed into one figure. Projects carry the full five-year plan; the activities inside them stop at the budget year.
| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 0.0 |
| FY2026 | Enacted | 63.2 |
| FY2027 | Request | 62.1 |
| FY2028 | Outyear | 68.7 |
| FY2029 | Outyear | 70.6 |
| FY2030 | Outyear | 67.3 |
| FY2031 | Outyear | 68.7 |
5 accomplishments / planned programs
The R-2A exhibit — the only level of the budget that describes work that has not happened yet. Activities carry the prior, current and budget year only, no five-year plan. 1 of them describes FY2027 work in enough detail to have its own page; the rest are shown here in full. Coverage is partial across the corpus, so count activities, never total them.
FY2027 planned work Continue development of TI-24/APB-25 and TI-26.
FY2026 to FY2027 change The $2.139M decrease in funding in FY 2027 is a result of de-scoping previously planned system improvements.
FY2026 plans — current year Complete development of TI-24/APB-23 and continue development of TI-24/APB-25. Commence development of TI-26.
FY2027 planned work Continue development, integration and test of AN/BYG-1 TI-26 and AN/BYG-1 TI-28.
FY2026 to FY2027 change The $0.434M decrease is a result of de-scoping previously planned system improvements.
FY2026 plans — current year Continue development, integration and test of AN/BYG-1 TI-26.
Continue software development efforts to support submarine payload integration of MK 48 Advanced Capability (ADCAP) torpedo variants Mod 8 and 9. Continue development and test of payload capabilities that have been integrated into the Payload Control System to include CRAW, Harpoon, future countermeasures, and classified payloads.
Read the FY2027 plan →FY2027 planned work Complete development of CyberSecurity Toolkit and IA Certification Testing on BYG-1 TI-24. Continue TI-26 feature development and Cyber requirements definition. Continue Risk Management Framework (RMF) accreditations for various sub-systems.
FY2026 to FY2027 change The $1.282M increase is to support re-instituting cyber capability development and improvements to the Information Assurance (IA) sub-system.
FY2026 plans — current year Complete development of CyberSecurity Toolkit and IA Certification Testing on BYG-1 TI-24. Continue TI26 feature development and Cyber requirements definition. Continue RMF accreditations for various systems.
FY2027 planned work Complete APB-25 DT (payload and rearchitecture build) with new longevity test plans. Commence APB-25 OT.
FY2026 to FY2027 change Increase by $0.069M due to inflation.
FY2026 plans — current year Complete APB-21 OT and APB-23 DT. Commence APB-23 OT and APB-25 DT.
Named performers on project 0236
Performers named in the R-3 exhibit under this project. Share is of the project's whole FY2027 R-3 total — the same denominator the program-element split uses, so the two read on one scale and will not sum to 100% when unnamed or government work is in the mix. Budget-justification contract funding, not obligations.