New London Naval Submarine Base is the US Navy's primary submarine base, known as the "Home of the Submarine Force", or the "Submarine Capital of the World". The base supports twenty-one attack submarines and the Navy's nuclear research deep submersible NR-1. Housed at the base are more than 40 tenant commands. Located approximately 2 miles away, across the river, connected by the Gold Star Memorial Bridge, is the US Coast Guard Academy.