Satellite data (coarser bottom layer) overlaid with the entire EM300 bathymetry data set (higher resolution top layer), collected on the 2003 OE Ring of Fire expedition. The fly-over is from south to north along the volcanic Mariana arc. Islands are green. Island data are from the Shuttle Radar Topography Mission, courtesy of USGS and NASA. EM300 bathymetry (35 meter grid), islands (30 meter grids), satellite (3500 meter grid).