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DD(X) Quarter Scale Model Underwater Explosive Testing Successful

ABERDEEN, Md., June 1, 2005 -- The DD(X) National Team, led by Northrop Grumman and in partnership with Raytheon, General Dynamics, United Defense and Lockheed Martin, announces the successful completion of Underwater Explosion (UNDEX) testing on the DD(X) Quarter Scale Model. This test provided a critical step in demonstrating that the DD(X) wave piercing tumblehome hull form fully meets the operational requirements set forth by the U.S. Navy.

The primary purpose of the testing was to determine the DD(X) hull form's reaction to an UNDEX to demonstrate the validity of the DD(X) design. Explosive charges were placed at predetermined distances from the DD(X) Model. Intensity of the charges increased as the test series progressed. A large plume resulted from the explosions and the DD(X) wave-piercing bow, tumblehome cross section, step deck area and rising stern responded as envisioned.

"The successful completion of this event increased the overall confidence level in the DD(X) hull design and was carried out at a fraction of the cost for testing a full-size model," said Brian Cuccias, Northrop Grumman Vice President and DD(X) Program Manager. "We are meeting Phase III exit criteria and are eager to begin detail design of this truly revolutionary ship."

The 150 foot DD(X) Quarter Scale Model was built at the Northrop Grumman Ingalls Shipyard in Pascagoula, MS. This scaled down model mitigates risks associated with a new design at a nominal investment. The UNDEX tests were conducted by Northrop Grumman employees with the support of U.S. Army personnel and under the auspices of the U.S. Navy. Data collection and analysis continue and the knowledge of the hull form response, as well as lessons learned will be applied to Phase IV of the DD(X) program.

In partnership with the United States Navy, Northrop Grumman, Raytheon, General Dynamics, Lockheed Martin and United Defense are leading a premier National Team to design DD(X) - a revolutionary multi-mission destroyer. DD(X) technologies are currently in an advanced state of development and are destined to influence ship design efforts around the world for the remainder of this century. The National Team, which includes more than 100 U.S. companies from 45 states, understands the importance of the rapidly maturing DD(X) Program to our nation, and is proud of the historic role this vessel will play in the advancement of ship - and ship systems - design. The DD(X) National Team has successfully completed nearly a dozen incremental design review milestones, highlighting the DD(X) National Team's commitment to staying on schedule and on cost, as well as the extraordinary maturity and discipline of the program's approach to integrating unprecedented advanced technologies into the platform.

Contacts:     Mr. Brian Cullin
              DD(X) National Team 
              (202) 264-7113 
DD(X) Quarter Scale Model undergoing testing at the U.S. Army's Aberdeen Test Center in Maryland. Click on photo for related video footage.