Submarine SWFTS Modernization

Mission — Submarine SWFTS Modernization source

Submarine Warfare Federated Tactical Systems(SWFTS) is a family of interdependent systems that conduct cooperative system development, procurement, and installations. The SWFTS Participating Acquisition Resource Managers (PARMs) are comprised of PMS401 Acoustic Rapid Commercial Off The Shelf (COTS) Insertion (A-RCI), PMS425 Combat Control (BYG-1), and PMS 435 Integrated Submarine Imaging System (ISIS) and Electronic Warfare (EW BLQ-10). SWFTS Technical Insertion (IT) shipsets must be procured and installed in like quantities (Except EW SSBN (OHIO)) across all PARMs to maintain the SWFTS model. Project 0219 (PMS 401): The AN/BQQ-10(V) Acoustic Rapid COTS Insertion (A-RCI) Submarine SONAR system will continue to add new capabilities via Technical Insertion (TI)/Advanced Processing Build (APB) process while working across Submarine Warfare Federated Tactical System (SWFTS) programs to transition to Development Security Operations (DevSecOps) software processes and migrate to a cloud-based architecture. Sensor Efforts provide increased operational capabilities for littoral operations, situational awareness, and reliability improvements. This program delivers block updates to Sonar Systems installed on SSN 688i, SSN 21, VIRGINIA, SSBN, and SSGN Class Submarines to maintain clear acoustical, tactical, and operational superiority over Submarines and Surface Combatants in all scenarios through detection, classification, localization, and contact following. Project 0236 (PMS 425): 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 0253 (PMS 435): The Navigation and Electro-Optical Support Program is responsible for the development and improvement of low-profile masts and Integrated Submarine Imaging System (ISIS) to support safe and effective operations in high density environments, state of the art visual intelligence gathering, and employment of surveillance and weapons systems. Project 0775 (PMS 435): The Submarine Support Equipment Program is responsible for the development and improvement of submarine Electronic Warfare (EW) systems in support of effective operations in the areas of Joint Littoral Warfare, Joint Intelligence Surveillance Reconnaissance, Indications and Warning, Electronic Warfare, Information Operations, including Cyber, and Special Operations Force support. Sustained and significant improvements to submarine EW systems are required to maintain tactical ship safety and operational effectiveness. Beginning in FY26, funding for the following projects will realign to this PE 0604503N: PE 0604562N Project 0236 - SSN Comb Cont Sys Imprvmnt (ENG) PE 0604777N Project 0253 - Nav & Electro-Optical Supt

Mission — Sub Sonar Improvement (ENG) source

The AN/BQQ-10(V) Acoustic Rapid COTS Insertion (A-RCI) Submarine SONAR system will continue to add new capabilities via Technical Insertion (TI)/Advanced Processing Build (APB) process while working across Submarine Warfare Federated Tactical System (SWFTS) programs to transition to Development Security Operations (DevSecOps) software processes and migrate to a cloud-based architecture. The Navy is pursuing a transformation across SWFTS (PE 0604503N Projects 0219, 0236, 0253 and 0775) to maximize cyber-resiliency and the speed of capability delivery. FY 2024 funding request reflects a net decrease of $3.304 million from FY 2024 to FY 2025. These decreases are associated with transfer for Small Business Innovation Research / Small Business Technology Transfers (SBIR/STTR) and investments and miscellaneous rate adjustments. FY 2026 funding request reflects a net increase of $4.647M million from FY 2025 to FY 2026. Program internal adjustments increased funding associated with requirements to complete design of an improved environmental sensor that will be backfit on all VA class submarines. Increase also funds design to outfit all SSBNs with a Lightweight Low-Cost Conformal Array (LwLCCA) technology refresh for safety of navigation and situational awareness. This program delivers block updates to Sonar Systems installed on SSN 688, 688I, SSN 21, VIRGINIA, SSBN, and SSGN Class Submarines to maintain clear acoustical, tactical, and operational superiority over Submarines and Surface Combatants in all scenarios through detection, classification, localization, and contact following. Acoustics Rapid COTS Insertion (A-RCI) provides multi-phased evolutionary development geared toward addressing acoustic superiority issues through the rapid introduction of interim development products applicable to all Classes of Submarines. - A-RCI Phase I and II introduced Towed Array processing improvements - Phase III introduced Spherical Array processing improvements - Phase IV provided High Frequency (HF) Array processing improvements for SSN 688I, SSGN, SSBN, VIRGINIA, and SSN 21 Class Submarines. As part of the Navy's plan to maintain acoustic superiority for in-service submarines, a joint cooperative effort was established to deliver bi-annual Advanced Processing Builds (APBs) to prevent obsolescence and deliver ongoing capability improvements. - Capabilities in the APBs will be integrated as part of A-RCI certified systems. Sensor Efforts provide increased operational capabilities for littoral operations, situational awareness, and reliability improvements.

Mission — SSN Comb Cont Sys Imprvmnt (ENG) source

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. Provides funding for the development of Legacy Launchers; MTWS; Information Assurance system; Onboard Team Trainer (OBTT); and Common Infrastructure Services (CIS) subsystem. This includes integration of OBTT - Master Controller (OBTT - MC) & Inter-Subsystem Monitoring Tool (ISMT) efforts as well as other common services within SWFTS. FY26 continues funding for development of TI-26 and completion of TI-24. Cybersecurity efforts continue to evolve in future baselines to keep pace with the threat. Integration efforts for additional submarine payloads including MK48 ADCAP variants APB 6, APB 7 and APB 8 continue in FY26.

Mission — Nav & Electro-Optical Supt source

AN/BVY-1 Integrated Submarine Imaging System (ISIS) will continue to add new capabilities via Technical Insertion (TI)/Advanced Processing Build (APB) process while working across Submarine Warfare Federated Tactical System (SWFTS) programs to develop according to Development Security Operations (DevSecOps) software processes and a cloud based architecture. The Navy is pursuing a transformation across SWFTS (PE 0604503N Project 0219, Project 0236, Project 0253, and Project 0775) to maximize cyber-resiliency and the speed of capability delivery. FY26 maximizes mast RDTE investment and optimizes production through two distinct development programs. First, the New Mast Capability Development Program will build on prior year investment by continuing to insert emerging technologies for future mast module production. Second, the Legacy Mast Improvements Program will specifically focus on incorporating mature technologies and design improvements into legacy masts. This effort will provide substantial improvements to the large inventory of photonics and imaging masts. Both programs will ensure that submarines can conduct operations in high intensity littoral environments, intelligence gathering, real time imagery, and support the safe and effective employment of surveillance and weapons systems. Finally, FY26 funds the TI-22/APB-23 DT, TI-22/APB-23 OT and other tests that verify software improvements funded in previous fiscal years. The Navigation and Electro-Optical (E-O) program enables littoral operations by procuring ISIS, production of low profile masts (Low Profile Photonics Mast (LPPM), Type 20, and Type 24), maintenance and sustainment of periscope and legacy photonic masts, production and sustainment of Universal Modular Mast Systems and Dip Loops, and development of the ISIS inboard processing component of Submarine Warfare Federated Tactical Systems (SWFTS). The Department of the Navy established the ISIS to rapidly field the Type 18 periscope, RADAR rangefinder, Type 8 Mod 4 Infra-Red (IR) periscope systems, and integrate existing periscope imagery systems into a single imaging system for installation on board SSN 688 class and SEAWOLF class submarines. The ISIS baseline also includes the Imaging System with the Photonics mast (PM) and all configurations of low profile masts onboard VIRGINIA and Photonics Mast Variant (PMV) onboard SSGN class submarines and ISIS on SSBN class submarines. The PM, LPPM, and PMV design exploit a wide portion of the electro-magnetic spectrum through advanced E-O and thermal imaging and Electronic Warfare Support (ES)/communications intercept. The Common Submarine Imaging System (CSIS) capability development document (CDD), that covers both ISIS and Legacy Imaging systems was approved 22 Dec 2011 with an updated CDD approved on 15 Mar 2018. The CDD Annex for Low Profile Digital Photonics Mast, approved on 02 Dec 2019, provides additional specifications for the development of low profile masts within the ISIS system.

Mission — Submarine Supt Equip Prog source

AN/BLQ-10 Electronic Warfare (EW) system will continue to add new capabilities via Technical Insertion (TI)/Advanced Processing Build (APB) while working across Submarine Warfare Federated Tactical System (SWFTS) programs to transition to Development Security Operations (DevSecOps) software processes and migrate to a cloud based architecture. The Navy is pursuing a transformation across SWFTS (PE 0604503N Projects 0219, 0236, 0253 and 0775) to maximize cyber-resiliency and the speed of capability delivery. Major capabilities that will be pursued in FY26 include the completion of development for the server-based RADAR Wide Band capability, development for a Digital Early Warning Receiver (DEWR), upgraded and new tactical software solutions, and initial development of the next generation of Submarine Tethered Expendable Buoys (STEB). The Submarine Support Equipment Program (SSEP) is responsible for the development and improvement of submarine EW systems in support of effective operations in the following mission areas: Joint Littoral Warfare; Joint Intelligence Surveillance Reconnaissance (ISR), Indications and Warnings; Electronic Warfare; Information Operations including Cyber; and Special Operations Force (SOF) support. The rapid proliferation of complex radar, communications and navigation equipment available to potential adversaries creates an increasingly dense and sophisticated electromagnetic environment. Sustained and significant improvements to submarine EW systems are required to maintain tactical ship safety and operational effectiveness. As such, EW was raised to a submarine primary mission area in FY2012 by Commander Submarine Forces, and EW is listed as a Tier 1 modernization requirement by the Submarine Tactical Requirements Group (STRG). TI-26 provides a DEWR capability. Additionally, TI-26 looks to improve the basic cloud based architecture developed during TI-22 and TI-24. Funding is critical to developing enabling technologies that will provide maximized electronic spectrum digitization and processing, allowing Submarine EW system to continue to pace the threat. STEB is a 3" Launcher deployed, expendable, free-floating buoy that will communicate with the submarine through a fiber-optic tether providing imaging, Radar Indications and Warning, Radar Direction Finding, and communications.

Accomplishments & Planned Programs (3)