This dataset contains the processed Hydrology (HYD) data collected on Franklin voyage FR 32/91. The voyage took place in the Tasman Sea off the south east coast of Tasmania in the jarosite dump region during 27-31 March 1991. This dataset has been processed and is archived within the CSIRO Marine and Atmospheric Research Data Centre in Hobart. Additional information regarding this dataset is contained in the cruise report for this voyage and/or the data processing report (as available). Franklin on-voyage hydrology data are typically obtained from water samples collected in Niskin bottles at various depths during each CTD cast. Parameters measured normally comprise temperature, salinity, dissolved oxygen, phosphate, nitrate, silicate and nitrite.