Portsmouth, << PAWRTS muhth, >> Naval Shipyard, New Hampshire, occupies about 300 acres (120 hectares) on a group of connected islands in the Piscataqua River. The islands are within Maine, but the naval base uses nearby Portsmouth, New Hampshire, as its post office address.
Shipbuilding on the Piscataqua River dates from 1645, but the first ship built at the navy yard, established in 1800, was not launched until 1815. After World War I (1914-1918), the base specialized in submarine construction. The base continued to build submarines until 1969. Today, the base focuses on submarine remodeling and repair.
