Navy Large Unmanned Surface and Undersea Vehicles: Background and Issues for Congress [Updated September 17, 2020] [open pdf - 3MB]
From the Introduction: "This report provides background information and potential issues for Congress for three types of large unmanned vehicles (UVs) that the Navy wants to develop and procure in FY2021 and beyond:  Large Unmanned Surface Vehicles (LUSVs);  Medium Unmanned Surface Vehicles (MUSVs); and  Extra-large Unmanned Undersea Vehicles (XLUUVs). [...] The issue for Congress is whether to approve, reject, or modify the Navy's acquisition strategies and FY2021 funding requests for these large UVs. The Navy's proposals for developing and procuring them pose a number of oversight issues for Congress. Congress's decisions on these issues could substantially affect Navy capabilities and funding requirements and the shipbuilding and UV industrial bases."
CRS Report for Congress, R45757
Congressional Research Service: https://crsreports.congress.gov/