This data set was acquired with a ship-based Kongsberg EM122 Multibeam Sonar system and Kongsberg EM121A Multibeam Sonar system assembled as part of the 2006 IBM:Gardner data compilation (Chief Scientist: Dr. James Gardner). These data files are of ESRI ASCII Grid format and include gridded Acoustic Backscatter data and were processed after data collection. Data were acquired as part of the project(s): Compilation of UNH Law of the Sea bathymetry and backscatter mapping in the Marianas region, and funding was provided by NSF grant(s): Law of the Sea. This data was cited by Gardner, 2010.