Ocean Floor Geophysics Ltd. (OFG), in cooperation with Fukada Salvage and Marine Works Co. Ltd., has completed a high-resolution controlled-source electromagnetic (CSEM) survey of near-surface gas hydrates using the Scripps Institution of Oceanography Vulcan system for the National Institute of Advanced Industrial Science and Technology in Japanese waters, according to a press release. The survey comprises more than 500 line km (31 miles) of high-resolution data collected using the Fukada vessel Shin Nichi Maru. Water depths were from 400 m to 1,100 m (1,312 ft to 3609 ft). A 3-D inversion of the EM data for an area of interest has been completed. The contract for the 3-D inversion of the data for the entire survey area also has been awarded to OFG and will be completed in November this year. Fukada acted as prime contractor.