Electronics Technician 2nd Class Anthony Juarez and Electronics Technician 3rd Class Codie Flanagan, assigned to Naval Mobile Construction Battalion (NMCB)1, adjust frequency codes on a GRC-234 high-frequency base station at Naval Base Guam July 27, 2017. These tests give NMCB 1 Sailors the opportunity to perform quality assurance checks on their system’s maximum range and communication quality with Port Hueneme, Calif. NMCB 1 provides expeditionary construction and engineering support to expeditionary bases and responds to humanitarian assistance disaster relief requests. (U.S. Navy Combat Camera photo by Fire Controlman 2nd Class Alexander Lee)