Mark Maintenance Navy Petty Officer 3rd Class Chandler Mathis installs a feed chute to a Mark 38 25mm machine gun aboard the USS John Finn in the Pacific Ocean, Jan. 5, 2021. SHARE: Download: Full Size (1.68 MB) Tags: Navy Credit: Navy Petty Officer 3rd Class Jason Waite VIRIN: 210105-N-SS350-1079T.JPG Photo Gallery