SSN(X)
Abstract
The U.S. Navy must protect the security of the American people by defending against great powers, regional adversaries, and transnational threats. Strategic Competition is increasing the demand on the U.S. Navy submarine force. Submarines will be the principal method to deterring strategic competition aggression and will be the first to fight. The U.S. Navy must meet the rising challenge by delivering a new attack submarine. SSN(X) will be designed to counter the growing threat posed by near peer adversary competition for undersea supremacy. It will provide greater speed, increased horizontal payload capacity, improved acoustic superiority and non-acoustic signatures, and higher operational availability. SSN(X) will conduct full spectrum undersea warfare and be able to coordinate with a larger contingent of off-hull vehicles, sensors, and friendly forces. It will retain and improve multi-mission (Anti-submarine warfare (ASW), Anti-surface warfare (ASuW), Strike, Special Operating Forces (SOF), Mine, Subsea Seabed Warfare (SSW), Intelligence, Surveillance and Reconnaissance (ISR)) capability and sustained combat presence in denied waters. SSN(X) will operate independently or integrated within a Task Force. The primary goal of the SSN(X) program element will be to evaluate a broad range of submarine designs, technologies, sensors, and combat system components required to produce an affordable platform which supports these mission requirements. SSN(X) will continue to define requirement options and refine cost estimates to support a 2040 authorization. As the SSN(X) program continued to ramped up, FY 2023 efforts focused on expanding trade studies and technology assessments; acquisition documentation development and support; engineering support efforts; ship design management efforts; and preliminary technology development informed by the ICD. FY 2024 expanded the efforts in the areas of trade studies, design engineering, prototyping and technology assessments and initial development. SSN(X) also increased focus on propulsor and shafting, advanced material development, prototyping, improved stealth and payload capacity, infrastructure evaluation and readiness, and industrial base evaluation and planning. The AoA will be initiated in FY 2024 and planned to be completed by FY2025. Additionally, SSN(X) focused on whole ship concepts, payload systems, non-propulsion Hull, Mechanical, and Electrical (HM&E) systems, Command, Control, Communications, Computers, and Intelligence (C4I), and hull and structures to better understand the best way to meet the warfighter priorities of increased horizontal payload capacity, increased speed, increased acoustic superiority and non-acoustic signatures, and increased operational availability. SSN(X) is utilizing digital engineering and industry and supply chain information to meet capability priorities while designing in availability and ensuring affordability. SSN(X) is using a mission engineering approach to ensure that mission utility drives the planned design, development, prototyping and testing. FY 2025 will focus on maintaining the efforts started in FY 2024 and completion of the AoA. SSN(X) will incorporate best practices and lessons learned from the Virginia Class and Columbia Class submarines. FY 2025 funding levels are required to execute planned efforts and support completion of the AoA.
Document Details
- Document Type
- R2 Budgetary Justification
- Publication Date
- Oct 01, 2025
- Source ID
- 0604850N_5_1319_PB_2025
- Change Summary Explanation
- FY23 Adjustment: -$1.664 decrease for SBIR FY25 Adjustments: -$201.638M decrease for shift of lead ship authorization to 2040 -$0.432M increase for inflation and rate adjustments -$6.112M decrease for CIVPERS, ROC, AOR reduction -$0.259M decrease for NAVWAR Unachievable SYSCOM Efficiency -$0.473M Navy Offset for Corporate
- Service Agency Name
- Navy
Entities
Organizations
- United States Navy
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