http://weblog.greenpeace.org/whales/2008/01/hydrophone_test.html#more We were offline all day yesterday; otherwise you would have been able to spot some the pretty spectacular icebergs on the webcam! Yesterday we tried out the hydrophone which can record whales under water. Together with Jetske, Gavin and Neil I have worked on finding the ideal way to place and deploy it from the boats. I worked with hydrophones in Brazil previously, but with another and simpler kind. There are few recordings of whales from the Southern Ocean, and I am very keen on recording whales here. This hydrophone can record from longer distances, but we also work under radically different circumstances than in Brazil. We have put heavier weights on the hydrophone, and it would be possible to record even if the boat would travel at a speed of 15 knots. Here is a video that explains how the hydrophone works. As you can see by the t-shirts it was made before we reached these cold waters! More: Maybe you have some whale fluke pictures lying around? There is a group on Flickr that collects pictures of whale flukes from the Atlantic or the Pacific: http://www.flickr.com/groups/humpbackflukes/
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