150415-N-DI719-065 IMPERIAL BEACH, Calif. (April 15, 2015) - Gunner's Mate 2nd Class Anthony Hernandez describes an M240 machine gun to a Navy Junior Reserve Officers Training Corps (NJROTC) cadet from Edward C. Reed High School during a tour of Coastal Riverine Group 1. Coastal Riverine Force is a core Navy capability that provides port and harbor security, high value asset protection and maritime operations in coastal and inland waterways. (U.S. Navy photo by Chief Mass Communication Specialist Elena Hawthorne/RELEASED)