SANTA RITA, Guam (Oct. 19, 2020) Electronics Technician 2nd Class Ian M. Tuck, assigned to Naval Mobile Construction Battalion (NMCB) 133, Detachment Guam, conducts a high frequency communications check over voice with Marine Wing Communications Squadron 18 (MWCS-18) during NMCB-133’s joint communications exercise. During the exercise, Tuck conducted voice and data communication checks with NMCB-3 Detachment Japan, MWCS-18, Marine Air Support Squadron 2 (MASS-2), and Marine Air Control Squadron 4 (MACS-4), stationed on Okinawa, Japan. (U.S. Navy photo by Chief Electronics Technician Joshua J. Clower)