The following is the April 2022 Government Accountability Office report, Uncrewed Maritime Systems: Navy Should Improve Its Approach to Maximize Early Investments.
From the report
What GAO Found
Other nations are investing in new weapons and technologies designed to disrupt
U.S. naval advantages. Consequently, the U.S. Navy is reexamining its maritime
strategy to respond to increased competition at sea. Based on the results of its
analyses, the Navy determined that surface and undersea vehicles...
https://news.usni.org/2022/04/08/gao-report-on-navy-unmanned-systems