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A working group of experts (i.e., biologists, acousticians, and other researchers with extensive experience working in the Hawaii Range Complex [HRC]) was convened in San Diego, California, for an HRC Data Analysis Planning Meeting on 10 and 11 September 2012. The purpose of the meeting was to assess how existing HRC monitoring data can be used to support the United States (U.S.) Pacific Fleet’s regulatory requirements to determine the: 1) presence/absence, abundance, and density of marine mammals and sea turtles in the HRC; and 2) behavioral responses of marine mammals and sea turtles to U.S. Navy training exercises, including mid-frequency active sonar and underwater detonations.