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SACRAMENTO, Calif., Dec. 1 /PRNewswire-FirstCall/ -- Aerojet, a GenCorp (NYSE: GY) company, announced today that the Nulka Active Missile Decoy System, which uses Aerojet's solid rocket motor, has reached the 100th installation milestone on a U.S. Navy ship.

For this achievement, the Nulka system received the honor of 'Defence Project of the Year' in the Major Product category, by the Australian Defence Magazine (ADM). The ADM annual defense industry award recognizes Australia's Defence Materiel Organization (DMO) and its industry team of suppliers for demonstrating innovation in planning, execution efficiency, results delivery and overall project management approach.

In research, development and production for 20 years, the Nulka Active Missile Decoy is designed and integrated by BAE Systems Australia. The system is a rocket-propelled active decoy designed to lure anti-ship missiles away from intended targets. Aerojet's Orange, Va. facility manufactures the fully-compliant insensitive munition solid rocket motor for the system and has delivered 700 rocket motors under this contract. Aerojet is also a world class supplier of propulsion systems for the U.S. Navy, including the Standard Missile and Tactical Tomahawk motors and the Coyote Supersonic Target ramjet engine.

To date, approximately 500 Nulka decoys have been produced for the Royal Australian, U.S. and Canadian navies and deployed on nearly 120 surface combatants. Application to U.S. Navy ships is managed by NAVSEA with support from branches of the Navy Surface Warfare Center and the Naval Research Laboratory.

The threat to commercial and military shipping presented by sea-skimming missiles has been validated. "Nulka is a weapon with the full capability to defeat this threat," said Aerojet Program Manager, Richard Brown. "To meet this mission, the solid rocket motor has the tightest ballistics performance standard of any motor in the active inventory. Our Aerojet team has achieved 100 percent qualification success rate through seven years of production history."

Aerojet is a world-recognized aerospace and defense leader principally serving the missile and space propulsion, defense and armaments markets. GenCorp is a leading technology-based manufacturer of aerospace and defense products and systems with a real estate segment that includes activities related to the entitlement, sale, and leasing of the company's excess real estate assets. Additional information about Aerojet and GenCorp can be obtained by visiting the companies' Web sites at http://www.Aerojet.com and http://www.GenCorp.com.