From the Document: "Although the term 'naval forces' is often used to refer specifically to Navy forces, it more properly refers to both Navy and Marine Corps forces, because both the Navy and Marine Corps are naval services. [...] The Navy and DOD since 2019 have been working to develop a new Navy force-level goal that is expected to introduce at least some elements of a new fleet architecture featuring a smaller proportion of larger ships (such as large-deck aircraft carriers, cruisers, destroyers, large amphibious ships, and large resupply ships); a larger proportion of smaller ships (such as frigates, corvettes, smaller amphibious ships, smaller resupply ships, and perhaps smaller aircraft carriers); and a new third tier of large unmanned surface and underwater vessels. On December 9, 2020, the Trump Administration released a document that presents an envisioned Navy force-level goal for achieving by 2045 a Navy with a more distributed fleet architecture, including 382 to 446 manned ships and 143 to 242 large unmanned vessels. The Biden Administration can choose to adopt, revise, or set aside this document."
CRS In Focus, IF10486
Congressional Research Service: https://crsreports.congress.gov/