This data set was acquired with a ship-based Navigation system during Maurice Ewing expedition EW9008 conducted in 1990 (Chief Scientist: Dr. Lindsay Parson). These data files are of Shapefile format and include Navigation data and were processed after data collection. Data were acquired as part of the project(s): Sidescan sonar and swath bathymetry investigation of the Reykjanes Ridge, southwest of Iceland. Funding was provided by the NSF.