This data set was acquired with a Sippican XCTD-1 XCTD Expendable Probe during Marcus G. Langseth expedition MGL1109 conducted in 2011 (Chief Scientist: Dr. Ginger Barth; Investigator(s): Dr. Jonathan Childs). These data files are of Sippican MK21 Export Data File format and include Sound Velocity, Temperature, Salinity, and Conductivity data that have not been processed. Data were acquired as part of the project(s): US Extended Continental Shelf Project.