DEFENSE

Litton Names New Chief Operating Officer: Michael R. Brown was also named executive vice president and a director of Litton Industries Inc., a defense electronics and Navy shipbuilding concern based in Woodland Hills. Brown, 54, had been group executive for Litton’s electronic warfare systems unit. Litton also said its president and chief executive, John M. Leonis, will be elected chairman. Leonis, 61, will succeed Alton J. Brann, who has been a non-executive chairman since Litton spun off its commercial lines last year to create Western Atlas Inc. Brann remains Western Atlas’ chairman and chief executive.