This dataset contains the processed Hydrology (HYD) data collected on Diamantina voyage Dm 1/61. The voyage took place in the Indian Ocean and the Great Australian Bight during 14 February to 10 March 1961. 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). Diamantina on-voyage hydrology data are typically obtained from water samples collected in Nansen bottles at various depths. Parameters measured normally comprise temperature, salinity, dissolved oxygen, inorganic phosphate, total phosphorus and nitrate.