Multibeam echosounder data collected on Southern Surveyor voyage SS2012_t02 using the Simrad EM300 multibeam echosounder to acquire high resolution seafloor bathymetry and backscatter information. The voyage took place from Brisbane to Lautoka, off the Queensland coast, Great Barrier Reef, Gardner Bank, and South Pacific Ocean from the 2nd May to the 10th May, 2012. Ping rate varied according to depth. Data are stored in Simrad *.all raw format at CMAR and Geoscience Australia (GA). There are 191 files totalling 3.03 GB of raw data in this dataset. Additional information regarding this dataset is contained in the cruise report for this voyage and/or the data processing report (as available).