Machine Gun Manner Navy Petty Officer 2nd Class Marshelle Church mans the M240 machine gun aboard a Mark VI patrol boat during training provided by Coastal Riverine Group 1 Training and Evaluation Unit in San Diego, Sept. 19, 2019. The Coastal Riverine Force provides port and harbor security, high value security, and maritime security operations in the coastal and inland waterways. SHARE: Download: Full Size (1.39 MB) Tags: Coastal Riverine Force Credit: Navy Chief Petty Officer Nelson Doromal Jr VIRIN: 190919-N-NT795-758N.JPG Photo Gallery