USS Pennsylvania is a United States Navy Ohio-class ballistic missile submarine which has been in commission since 1989. The Ohio class is a class of nuclear .<br />Sharks of steel - the largest submarine in the U.S. Navy THE HIDDEN THREAT serves as an introduction to the submarine and the life the submariner leads.<br />Worlds Largest Nuclear-Powered Attack Submarine of U.S Navy Army - Full Documentary.<br />USS Connecticut -- the submarine USS Connecticut surfaces through the Arctic Ice. The Virginia-class submarine USS New Hampshire (SSN 778) and the .
