This data set was acquired with a Sippican T-5 XBT Expendable Probe during Roger Revelle expedition RR0901 conducted in 2009 (Chief Scientist: Dr. James Ledwell). These data files are of Sippican MK21 Export Data File format and include Sound Velocity and Temperature data that have not been processed. Data were acquired as part of the project(s): DIMES: Diapycnal and Isopycnal Mixing Experiment in the Southern Ocean - Cruise 2, and funding was provided by NSF grant(s): OCE06-22825.