Navy Petty Officer 2nd Class Patrick Riley, right, instructs Navy Seaman Jonathon Williams reloading a .50-caliber machine gun during a simulated small boat attack exercise in the Pacific Ocean, May 10, 2018. Riley is a quartermaster assigned to Coastal Riverine Group 1, Training and Evaluation Unit. Williams is a quartermaster assigned to Coastal Riverine Squadron 3. Navy photo by Chief Petty Officer Nelson Doromal Jr.