This data set was acquired with a ship-based Navigation system during Nathaniel B. Palmer expedition NBP9302 conducted in 1993 (Chief Scientist: Dr. Robin Ross). These data files are of SHP format and include Primary Navigation data and were processed after data collection. Data were acquired as part of the project(s): Long-Term Ecological Research on the Antarctic Marine Ecosystem (LTER): An Ice-Dominated Environment, and funding was provided by NSF grant(s): ANT90-11927 and OPP91-18439.