PORT HUENEME, Calif. (Aug. 30, 2022) Surge Maintenance Hull Maintenance Technician 1st Class Sang Vang demonstrates the Centerline SST low-pressure cold spray system, left, while underway on Naval Surface Warfare Center, Port Hueneme Division's (NSWC PHD) Self Defense Test Ship in the Pacific Ocean off the Port Hueneme, California, coast during the Repair Technology Exercise, or REPTX. Private industry participant EWI deployed the cold spray system to test its effectiveness in repairing cracks on the ship while at sea, a problem which was simulated using a section of damaged steel. (U.S. Navy photo by Eric Parsons)