 The main purpose of the ACV is to move Marines from ship-to-shore, but after that they primarily fight on land, asserting the need for ground fighting capabilities.Conventional ground fighting vehicles can be transported by landing craft like the Landing Craft Utility and Landing Craft Air Cushion, but amphibious landing ships are able to carry many times more amtracs than they can other landing craft or hovercraft carrying vehicles.LCACs can move to a beach faster, but cannot travel inland and are not able to take enemy fire.