Assault Craft Unit Four

Assault Craft Unit Four (ACU-4) is a United States Navy unit established in 1983 and based at Joint Expeditionary Base Little Creek-Fort Story, Virginia. Its primary mission is to operate and maintain Landing Craft Air Cushion (LCAC) vehicles, enabling rapid ship-to-shore movement of troops, vehicles, and equipment during amphibious operations. ACU-4 played significant roles in major exercises and real-world operations, including support for Operations Desert Storm, Iraqi Freedom, and humanitarian relief missions. The unit continues to be a vital component of the Navy’s amphibious capabilities, demonstrating flexibility and readiness in diverse environments around the world.