[1] NOAA, Northeast Fisheries Sci Ctr, Natl Marine Fisheries Serv, Woods Hole, MA 02543 USA
[2] NOAA, Marine Mammal Lab, Alaska Fisheries Sci Ctr, Natl Marine Fisheries Serv, Seattle, WA 98115 USA
[3] British Antarctic Survey, Madingley Rd, Cambridge CB3 0ET, England
[4] Microsoft Good Res Lab, 1 Microsoft Way, Redmond, WA 98052 USA
[5] Naval Ctr Space Technol NCST, Naval Res Lab, Washington, DC 20375 USA
[6] Univ Edinburgh, Sch Engn, Sanderson Bldg,Robert Stevenson Rd,Kings Bldg, Edinburgh EH9 3FB, Scotland
[7] Univ Canterbury, Sch Earth & Environm, Christchurch 8140, New Zealand
[8] Univ Minnesota, Dept Earth & Environm Sci, Minneapolis, MN 55455 USA
[9] Bur Ocean Energy Management, Environm Studies Program, Sterling, VA 20166 USA
[10] NOAA, Protected Resources Div, Alaska Reg Off, Natl Marine Fisheries Serv, Anchorage, AK 99513 USA