Heavy fog rolls over the Piscataqua River, nearly obscuring the Portsmouth Naval Shipyard on the opposite shoreline. Color painting the sky adds to the ethereal feel of the scene. For trivia buffs: the yard, established in 1800, is the oldest public shipyard in the nation. Today it specializes in submarine design, construction, modernization, and maintenance - and is the Navy's leading shipyard for submarine overhaul and repair.