The last report was dominated by the ‘big’ news of Blue Whales Balaenoptera musculus and ‘singing’ Humpback Whales Megaptera novaeangliae off Ireland. It was very opportune timing then for the Bioacoustics Research Program at Cornell University, in the United States, to publish some preliminary results (Technical Report 08-07) from a ten-year period (1996-2005) of monitoring seabed-mounted hydrophone arrays operated by the US Navy as part of the SOund SUrveillance System (SOSUS). The system was designed to detect submarine activity at low frequencies and is also, coincidentally, ideal for listening for and tracking the loud, infrasonic calls of large baleen whales, often at ranges of several hundred kilometres.

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