Marine detector spread having arrays of different lengths

Abstract From the Canadian patent

Abstract of the Disclosure, A detector spread for marine seismic exploration has arrays with lengths which are dependent upon the acoustic velocity and dip of the subsurface formations being explored upon the offset distance from the seismic source to the array and upon the reflection time of reflections from formations of interest. Hydrophones are positioned at approximately equally spaced intervals on a towing cable. The outputs of these hydrophones are combined to form arrays having lengths which are multiples of the intervals. Each array has the longest length possible, such that reflection amplitude response will remain in the band 0 ? .DELTA.T/? ? 1.