The primary focus of LCS is/was mine warfare. A strong secondary function is anti-swarm boat/missile boat screening. They also are intended to have an ASW function. It was originally meant to be an "area" mission...they were to move in, drop a network of sensors all over, then wait and pounce on any contacts. As that package of sensors started development, the Navy shifted to an "escort" ASW mission done "on the move." That meant changing to a VDS sonar and towed array, which is one of the primary reasons that package has been so delayed.