MARINE SEISMIC SURVEYING

摘要

In a new method and apparatus for performing a marine seismic survey, an array of parallel seismic streamers (16) containing hydrophones (32) is towed by a survey vessel (10). At least one tailbuoy (46) provided with a GPS receiver (50) is towed by the array, which has a network of acoustic emitters (40) and receivers distributed throughout it for determining the respective positions of the hydrophones with respect to the GPS receiver. To improve the accuracy of the position determinations, at least one further buoy (52) provided with a GPS receiver (58) is connected to be towed by the array from a point somewhere near the forward end of the array, and the positions of at least some of the hydrophones are determined with respect to both GPS receivers.