1. Acoustics and Sonar, Netherlands Organization for Applied Scientific Research (TNO), P.O. Box 96864, The Hague 2509 JG, The Netherlands
2. Sea Mammal Research Unit, Scottish Oceans Institute, School of Biology, University of St Andrews, St Andrews, Fife KY16 8LB, United Kingdom
3. JASCO Applied Sciences (Deutschland) GmbH, Eschborn, Germany
4. Faculty of Life and Environmental Sciences, University of Iceland, Askja, Sturlugata 7, 102 Reykjavik, Iceland
5. Sensor and Surveillance Systems, Norwegian Defense Research Establishment (FFI), NO-3191 Horten, Norway