Assault Craft Unit FOUR (ACU-4) is a United States Navy amphibious unit established in 1963. Stationed at Joint Expeditionary Base Little Creek-Fort Story in Virginia, ACU-4 is the Navy’s primary operational command for Landing Craft Air Cushion (LCAC) operations on the East Coast. The unit’s mission is to provide rapid ship-to-shore movement of troops, vehicles, and equipment in support of amphibious and expeditionary warfare. Over the decades, ACU-4 has supported numerous operations, exercises, and humanitarian missions, demonstrating its vital role in enhancing the Navy and Marine Corps’ operational flexibility and reach.
