Navy Next-Generation Attack Submarine (SSN[X]) Program: Background and Issues for Congress [May 10, 2021] [open pdf - 559KB]
From the Introduction and Issue for Congress: "The Navy wants to begin procuring a new class of nuclear-powered attack submarine (SSN), called the Next-Generation Attack Submarine or SSN(X), in FY2031. The SSN(X) would be the successor to the Virginia-class SSN design, which the Navy has been procuring since FY1998. Congress approved $1 million in initial research and development funding for the SSN(X) program in FY2021. An issue for Congress for FY2022 and subsequent years is whether to approve, reject, or modify the Navy's funding requests and acquisition strategy for the SSN(X) program. Congress's decisions on this issue could affect Navy capabilities and funding requirements and the U.S. shipbuilding industrial base."
CRS In Focus, IF11826
Congressional Research Service: https://crsreports.congress.gov/