Sub-bottom navigation data (ASCII format) acquired offshore Galveston, Texas, during the 2021 TrinSab Survey

The University of Texas Institute for Geophysics (UTIG) conducted a reconnaissance survey ("TrinSab") in April of 2021, aboard R/V Tommy Munro, to explore the stratigraphy of the outer Trinity River Paleovalley and its confluence with the Sabine River Paleovalley, with the broad goals of investigating the setting for the potential for sand resources, and for understanding the history of sedimentary deposition in this coastal/estuarine/marine setting in response to sea level rise in the Holocene. The sub-bottom data set was collected using an Edgetech 216 (2-16 kHz) chirp towfish. The navigation data files presented here are stored in the ASCII format with column headers and include the GPS antenna lat/lon and the layback corrected towfish lat/lon. Study collaboration and funding were provided by the U.S. Department of the Interior, Bureau of Ocean Energy Management, New Orleans, LA under Agreement Number M16AC00020.