180412-N-OO032-0106 GUAM (April 12, 2018) Gunner’s Mate 2nd Class Michael DeCesare, assigned to Coastal Riverine Squadron (CRS) 4, fires an M2 machine gun aboard a Mark VI patrol boat during a crew-served weapons qualification in the Philippine Sea. CRS-4 is assigned to Costal Riverine Group 1, and is capable of conducting maritime security operations across the full spectrum of naval, joint and combined operations.(U.S. Navy Combat Camera photo by Mass Communication Specialist 1st Class Cory Asato/Released)