Marine Corps Sgt. Joseph Sortman of Long Beach, California, is trained on polyalphaolefin fluid servicing carts, which cool F-35 aircraft mission systems, by Bill Pawlowski, Lockheed Martin senior field engineer, Sept. 24, 2024, at Marine Corps Support Facility Blount Island in Florida. The facility, located along the St. Johns River in northeast Florida, is the hub of Marine Corps’ prepositioning programs. With the transition to the F-35 offering advanced stealth and sensor capabilities in a long-range fighter platform, the aircraft’s ground support equipment is now a maritime prepositioning force asset—it must be strategically positioned with other combat-ready equipment and supplies. Technical subject-matter experts arrived at the facility in Florida for the induction. While contractors maintain the equipment, Marines must conduct in-process inspections, ensuring adherence to approved ground operations procedures. “We make sure everything is maintained correctly and safely,” said Sortman, ground support equipment quality assurance representative at Blount Island Command.