This is the first of two cruises of the R/V Tangaroa to investigate the oceanography of the Macquarie Ridge system. Macquarie Ridge is situated to the southwest of New Zealand and runs from Fiordland to south of Macquarie Islands. The major objectives were to: 1. deploy moorings to measure the transport of the Antarctic Circumpolar Current and its associated fronts through the two gaps in the Macquarie Ridge; 2. measure ocean tracer properties along the Macquarie Ridge and Campbell Plateau. 3.5kHz soundings were collected for use in planning future coring operations