From the Document: "U.S. naval forces give the United States the ability to convert the world's oceans--a global commons that covers more than two-thirds of the planet's surface--into a medium of maneuver and operations for projecting U.S. power ashore and otherwise defending U.S. interests around the world. The ability to use the world's oceans in this manner--and to deny other countries the use of the world's oceans for taking actions against U.S. interests--constitutes an immense asymmetric advantage for the United States. [...] [T]he size and composition of U.S. naval forces reflect the position of the United States as a Western Hemisphere power with a goal of preventing the emergence of regional hegemons in Eurasia. As a result, the U.S. Navy includes significant numbers of aircraft carriers, nuclear-powered attack submarines, large surface combatants, large amphibious ships, and underway replenishment ships. [...] On June 17, 2021, the Biden Administration released a document that calls for achieving a Navy with a more distributed fleet architecture, including 321 to 372 manned ships and 77 to 140 large unmanned surface and underwater vessels. [...] The size of the Navy in recent years has generally ranged between 270 and 300 battle force ships. As of December 16, 2021, the figure was 295."
CRS In Focus, IF10486
Congressional Research Service: https://crsreports.congress.gov/