Multichannel seismics data from the "Southern Kermadec Volcanoes: Geology and Benthic Biology" voyage by the R/V Tangaroa. Multichannel seismic reflection profiling was run across the Macauley caldera structure to image both typical sectors of the caldera, and possible breached wall on the northwestern rim. The orientation of the MCS lines was determined from the EM300 multibeam data. Survey Leader: Ian Wright Organisations: NIWA Seismic Instrument: 210 CU.IN. GI AIRGUN, 48-CHANNELS Navigation Instrument: Furuno GP500 DGPS Ports: Auckland to Auckland