Fine-tuning the Corps’ ACV in preparation for IOT&E - Cpl. Patrick Canterbury reads off instructions from the Interactive Electronic Technical Manual while Cpl. Austin Boyd performs a maintenance task on the Amphibious Combat Vehicle during the Logistics Demonstration aboard Camp Pendleton, California, on Sept. 11, 2019. Log Demo is designed to evaluate and correct, if needed, the maintenance and operational manuals for the ACV that will be eventually used by fleet Marines. (U.S. Marine Corps photo by Ashley Calingo)