Raw ship-based Multibeam Sonar Data acquired over the Cascadia margin during Thompson cruise TN177 (year 2005, investigator Paul Johnson)

This Cascadia margin bathymetry data set was acquired with a ship-based Kongsberg EM300 Multibeam Sonar system during Thompson cruise TN177 conducted in 2005 (Chief Scientist Paul Johnson). The data files are of MBSystem format and include Acoustic Backscatter and Swath Bathymetry data. This data set comprises the raw swath ping files.