Prior to the development of the "Block-V" Virginia-class submarine, the newest class of attack submarine in the United States Navy was the Seawolf-class. These were built after the Cold War with the ...
The U.S. Navy's fleet of submarines might be large, but it only has three Seawolf-class attack submarines: The USS Seawolf (SSN 21), the USS Connecticut (SSN 22), and the USS Jimmy Carter (SSN 23).