CHARLOTTESVILLE, Va. -- Litton Marine Systems (LMS), a subsidiary of Northrop Grumman Corporation (NYSE: NOC), has received EC Wheelmark type approval for the Sperry Marine SRD-331 Doppler speed log.

The type approval certificate was granted by the Registro Italiano Navale in Genoa, and authorizes Litton to display the Wheelmark of conformity in accordance with Council Directive 96/98/EC on Marine Equipment. The product was type-tested and certified to meet IMO Resolutions A.478(12), A.694(17), A.813(19) and A.824(19), as well as IEC 60945 and 61023.

The SRD-331 is a single-axis Doppler speed log designed to provide highly accurate speed and distance measurements for ARPA radars and other critical navigation systems. Sperry Marine's unique recursive digital filtering with an adaptive time constant produces fast response with no jitter in speed output.

LMS was formed from the consolidation of Sperry Marine (Charlottesville, Va., USA), Decca Marine (New Malden, UK) and C. Plath (Hamburg, Germany). LMS manufactures and markets products under the Sperry, Decca and C. Plath brand names. With offices in 19 countries and authorized service depots in more than 300 locations worldwide, LMS provides "one source" for marine navigation, communication and information systems, products and service.

Northrop Grumman Corporation is a $15 billion, global aerospace and defense company with its worldwide headquarters in Los Angeles. Northrop Grumman provides technologically advanced, innovative products, services and solutions in defense and commercial electronics, systems integration, information technology and non-nuclear shipbuilding and systems. With 80,000 employees and operations in 44 states and 25 countries, Northrop Grumman serves U.S. and international military, government and commercial customers.

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Contact:
Frank Soccoli
(434) 974-2656