This data set was acquired with a ship-based Atlas Hydrosweep DS2 Multibeam Sonar system during Maurice Ewing expedition EW0301 conducted in 2003 (Chief Scientist: Dr. Joe Haxel). 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): Hydroacoustic Monitoring of Seismicity in the North Atlantic, and funding was provided by NSF grant(s): OCE01-36808 and OCE01-37164.