TITLE: Oceanographic Data Collected Aboard RV Polar Duke January - February 1993 AUTHOR: CM Lascara, RC Smith, D Menzies and KS Baker CCPO Technical Report No. 93-02 SIO Reference Series No. 93-41 Palmer LTER Contribution No. 28 From 8 January - 7 February 1993, a multidisciplinary cruise was conducted aboard the RV Polar Duke as part of the Palmer Long-Term Ecological Research (LTER) program off the Antarctic Peninsula. Stations were occupied at specified grid locations (Figure 1) within the Palmer LTER survey grid (Waters and Smith, 1992). The cruise departed on 1 January and returned to Palmer Station, Antarctica (7 February). Oceanographic data were collected using a Bio-Optical Profiling System (BOPS) (for a complete description see Smith et al., 1984 and Smith and Baker, 1984). The BOPS package was configured with a SeaBird CTD sensor to measure temperature, conductivity, and pressure; A BioSpherical PAR and spectral irradiance sensor; and a SeaTech fluorometer. This data report presents the following hydrographic variables which were measured directly or derived from measured variables as part of this cruise: temperature, potential temperature, salinity, density, dynamic height, and Brunt-Vaisala frequency. Upon return from the cruise, the BOPS data were initially processed at the Center for Remote Sensing and Environmental Optics at University of California, Santa Barbara. Final processing and report generation were completed at the Center for Coastal Physical Oceanography (CCPO) at Old Dominion University. Tapes of this data at one-meter resolution have been sent to the National Oceanographic Data Center