191217-M-DB029-1063 CAMP PENDLETON, Calif. (Dec. 17, 2019) U.S. Marines with Amphibious Vehicle Test Branch, Marine Corps Tactical Systems Support Activity, take a new amphibious combat vehicle out for open ocean low-light testing at Del Mar Beach on Marine Corps Base Camp Pendleton, California, Dec. 17, 2019. The test was designed to assess and verify how well Marines can interface with the vehicle and operate at night. The ACV is an eight-wheeled armored personnel carrier designed to fully replace the Corps’ aging fleet of amphibious assault vehicles. (U.S. Marine Corps photo by Lance Cpl. Andrew Cortez/Released)