1. Ocean Networks Canada University of Victoria PO Box 1700 STN CSC Victoria BC V8W 2Y2 Canada
2. Department of Computer Science and Statistics University of Rhode Island Main Campus Kingston 02881 RI USA
3. Department of Geology University of Leicester University Road Leicester LE1 7RH UK
4. Geocoastal Research Group School of Geosciences The University of Sydney Sydney NSW 2006 Australia