Orlando FL (SPX) Nov 04, 2008 – Lockheed Martin marked the delivery of the 500th Arrowhead system to the U.S. Army at a celebration held at its Ocala and Orlando, FL, facilities. Arrowhead is the U.S. Army’s Modernized Target Acquisition and Designation Sight/Pilot Night Vision Sensor (M-TADS/PNVS) for the AH-64 Apache attack helicopter.