U.S. Marines with Amphibious Vehicle Test Branch, Marine Corps Tactical Systems Support Activity, drive a new Amphibious Combat Vehicle ashore during low-light surf transit testing at AVTB Beach on Marine Corps Base Camp Pendleton, California, Dec. 18. - U.S. Marines with Amphibious Vehicle Test Branch, Marine Corps Tactical Systems Support Activity, drive a new Amphibious Combat Vehicle ashore during low-light surf transit testing at AVTB Beach on Marine Corps Base Camp Pendleton, California, Dec. 18.