This dataset contains the underway data collected during the Tangaroa Voyage TAN0003 in 2000. This voyage carried out marine science studies off the Antarctic coast between the Dibble ice tongue and Ninnis Glacier as part of an experiment to study the effect of the Mertz Polynya on Antarctic bottom water formation. The voyage departed on 12th February 2000 from and returned on the 24th March 2000 to Wellington, NZ. Data include: latitude, longitude, date, time, ship heading, pitch, roll, relative humidity, air temperature, salinity, sea temperature, wind direction, and wind speed.