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For each of the major Navy ranges, the initial goal is to provide a Marine Mammal Monitoring on Navy Ranges (M3R) system that can be run with minimal operator intervention to collect passive acoustic detection archives on a nearly continuous basis. These archive files provide an electronic record of marine mammal acoustic activity and sonar activity, as well as marine mammal localization data from multiple algorithms with a focus on Blainville’s (Mesoplodon densirostris, Md) and Cuvier’s (Ziphius cavirostris, Zc) beaked whales. As algorithms become available and are incorporated into the system, algorithm-specific reports can be seamlessly integrated into the archives to provide a timesynchronous history of events.