WASHINGTON The U.S. Navy plans to upgrade its F-l4 fleet with a GEC-Marconi digital flight control system to improve handling and safety rier approach. during high-g maneuvering and carNavy test pilots who completed flight evaluation River, Md., of last the December, DFCS at NAS under Patuxent the Foreign Comparative Technology program, said performance during "up and away" and powered approaches to the carrier were improved substantially.

LONDON Rolls-Royce has teamed with General Electric and Allison Engine Co. to develop two engines for the Joint Advanced Strike Technology program and possibly other potential military aircraft applications. The three companies will now jointly develop the YF120 cruise engine and the GEA-FXL lift engine.

LOS ANGELES The four missiles China fired on Mar. 8 and 1 3 are the People's Liberation Army's (PLA) Dong Feng-15, according to the Pentagon. Intelligence officials expect a total of at least six DF-15s will be fired in the exercises. The missile is also known as the "M-9" for an export version that was never made.