During the period from 22th February to 29th March 1978 BGR acquired seismic lines in the Southeast Atlantic Ocean across the Walvis Ridge and the Guinea Plateau and off Mauretania during the second leg of cruise BGR78. The lines BGR78-127, BGR78-137 and BGR78-148 consist of raw data. The lines BGR78-128, BGR78-129, BGR78-130, BGR78-131, BGR78-132, BGR78-133, BGR78-134, BGR78-134A, BGR78-135, BGR78-136, BGR78-138, BGR78-139, BGR78-140, BGR78-141, BGR78-145, BGR78-146, BGR78-149, BGR78-150 and BGR78-151 are stacked data.