This data set was acquired with a ship-based Navigation system during Maurice Ewing expedition EW9102 conducted in 1991 (Chief Scientist: Dr. Robert Detrick). 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): Two-Ship Multichannel Seismic Investigation of the East Pacific Rise South of the Garret Fracture Zone, and funding was provided by NSF grant(s): OCE90-12596, OCE90-12707, OCE90-12781, OCE91-02899, and OCE92-96017.