USS Shad (SS-235), a Gato-class submarine, was the first submarine and second vessel of the United States Navy to be named for the shad, a fish of the herring family, common along coasts of the United States.

The Portsmouth Naval Shipyard, often called the Portsmouth Navy Yard, is a United States Navy shipyard on Seavey's Island in Kittery, Maine, bordering Portsmouth, New Hampshire. The naval yard lies along the southern boundary of Maine on the Piscataqua River.