The Navy is preparing to award follow-on contracts to as many as three companies to produce engineering development models of the anti-submarine warfare systems that will be used on the Littoral Combat Ship, according to a program official. Last year, the service awarded deals to Advanced Acoustics Concepts, L3 Communications and Raytheon, respectively, to develop designs for reducing the weight of the escort mission module -- a continuous active variable depth sonar and a passive multifunction towed array. The escort...