This data set was acquired with a ship-based Atlas Hydrosweep DS Multibeam Sonar system during Maurice Ewing expedition EW9513 conducted in 1995 (Chief Scientist: Dr. Steve Cande). These data files are of MBSystem Compatible format and include Swath Bathymetry data and were processed at sea using the open source MB-System multibeam sonar processing software. Data were acquired as part of the project(s): Early Tertiary Tectonic Evolution of the Pacific-Australia-Antarctic Plate Circuit, and funding was provided by NSF grant(s): OCE94-16779 and OCE94-16989.