Portsmouth Naval Shipyard (PNSY) has delivered Los Angeles-class attack submarine 'USS Pittsburgh' (SSN 720) on-time and under budget after drydock overhaul. PNSY conducted the Pittsburgh pre-inactivation restricted availability (PIRA) off-yard at Sub Base New London in Groton, Conn. beginning Sept. 5, 2012. Although PNSY routinely performs work off-yard, this was the first major Chief of Naval Operations availability of more than 100,000 man-days which PNSY executed outside of Kittery, Maine.