Popular Science brings us Future Navy Ships – Littoral Combat Ship. They write:

This is a small, fast ship (capable of 45 knots) for sub-hunting, mine-clearing, and fighting small boats near coastlines—the littoral region. Each LCS would be equipped with one of three distinct mission modules: a set of plug-and-play ship sensors, missiles, small boats, unmanned underwater vehicles and specially equipped helicopters, for mine warfare, anti-submarine warfare or surface combat. The base configuration would include antimissile batteries and a medium-caliber gun. The ships could clear mines and chase subs away from an area before the rest of the fleet arrived.

Also included in the article are three other ships designed for future combat. You can view the full article with photos HERE.