Assault Craft Unit 5

Assault Craft Unit 5 (ACU 5) is the United States Navy's Pacific operating unit for the Landing Craft Air Cushion (LCAC). Headquartered at Marine Corps Base Camp Pendleton, California, their mission is transporting, ship-to-shore and across the beach, personnel, weapons, equipment, and cargo of the assault elements of the Marine Air-Ground Task Force. ACU-5 has over 400 sailors, organized in five departments. A part of the United States Pacific Fleet, ACU-5 administratively reports to Commander, Naval Beach Group 1, a part of Expeditionary Strike Group 3.

Assault Craft Unit 5
Assault Craft Unit 5 (U.S. Navy) insignia, in 1998.png
Active1 October 1983 - Present
Country United States of America
SizeOver 400 personnel
Part ofDepartment of the Navy
HeadquartersMarine Corps Base Camp Pendleton
Nickname(s)Swift Intruders[1]
Motto(s)"No beach out of reach" [2]
EquipmentLanding Craft Air Cushion
Decorations5 star Accreditation plaque from the Commander of the Pacific Fleet[3]


Operations departmentEdit

The Operations department plans and executes the deployments of the unit's LCACs. Some of the sailors are deployed with amphibious readiness groups (ARG's).[4]

Maintenance departmentEdit

The ACU-5 Maintenance department has 5 maintenance groups that are in charge of the repair and upkeeping of LCACs.[4]

Supply departmentEdit

The Supply department is given an annual budget of 18 million dollars, and is required to catalog warehouses full uniforms, machine parts and equipment most of these warehouses have over 9000 parts each.[4]

Training departmentEdit

The Training Department provides basic and advanced LCAC operational training to all members of ACU-5. Much of ACU-5's LCAC training is conducted by Expeditionary Warfare Training Group Pacific (EWTGPAC).[4]

Executive departmentEdit

The Executive department is in charge of any administrative, technical, or medical paperwork involving ACU-5.[4]


LCAC or Landing Craft Air Cushion are air cushion vehicles, operated by the U.S. Navy and Japanese Maritime Self Defense Force.[5] The concept design for the modern day LCAC began in the early 1970s.[6] The purpose of the LCACs are to "carry heavy vehicles and cargo" onto beaches at high speeds and over longer distances. The LCACs are currently undergoing a Service Life Extension Program (SLEP), which will be completed on all 72 craft by 2020.

Assault Craft Unit Five (ACU-5), prepares to unload a Howitzer artillery gun along the Camp Pendleton coast


During Operation Desert Storm in 1991, there were eleven LCACs stationed on the Persian Gulf; this was the LCAC's largest deployment.[7] In 1992, ACU-5 deployed 3 LCACs to Japan and created a permanent military presence called detachment Westpac Alfa, which in 2012 became its own command, Naval Beach Unit 7, with 7 LCACS permanently stationed in Sasebo, Japan.[7] ACU-5 conducted landings in Somalia to help with Operation Restore Hope.[7]


  1. ^ Albertson, Russ. "Low Flying with the Swift Intruders". In flight USA.
  2. ^ J, Walker. "No Beach out of Reach: Assault Craft Unit 5 Delivers". Marine Corp Association & foundation. Archived from the original on 16 February 2015. Retrieved 15 February 2015.
  3. ^ "Assault Craft Unit 5 Awarded five star accredation plague for excellence in food service". 67 (2). 2004. Cite journal requires |journal= (help)[permanent dead link]
  4. ^ a b c d e Pike, John. "Assault Craft Unit FIVE". Retrieved 10 April 2012.
  5. ^ Polmar, Norman (2001). The Naval Institute guide to the ships and aircraft of the U.S. Fleet. Naval Institute Press. ISBN 1557506566.
  6. ^ "ACU 5".
  7. ^ a b c N/A, N/A. "ACU Five". Retrieved 10 April 2012.