Mauna Kapu tower, located on Oahu, is one of the tower sites that comprise the Anuenue digital microwave system throughout the Hawaiian chain. Anuenue is a collaborative partnership with the U.S. Coast Guard and state of Hawaii that replaced the aging analog microwave with a digital data transport system that supports official emergency communications requirements for state and federal agencies. (U.S. Coast Guard photo by Petty Officer 3rd Class Melissa E. McKenzie/Released)