A system for sorting data from seismic surveys at sea. The data are acquired by signal transmission/receiving by streamer cables, which streamers are equipped with position-defining instruments. For the sorting, the area to be surveyed is subdivided into squares of defined size and position. The data provided through the measurements is sorted, and accepted data is processed further and transferred to the individual squares in the grid pattern. On the basis of the data, the configuration and position of the streamer is also computed, and information regarding this is displayed on a screen. On the basis of these results, the coverage of the measurement area may be determined, and an adjustment of the vessel's steering can be carried out to allow one to obtain the best coverage of the area. The acquired data is stored for later treatment.
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