The survey has been carried out on board of the R/V Bannock - CNR. During the cruise, main aim of which was the tectonics and stratigraphic reconstruction of the eastern continental slope of Sardinia, a grid of single channel seismic profiles was collected using a 30 kJ - Sparker source (Teledyne Exploration, Houston - USA). From the original radio navigation system Loran-C, the coordinates have been later converted into geographical. The sparker profiles total 560 nm. The areas investigated during the survey BS77-I are: the eastern continental slope of Sardinia (seismic profiles BS), and the continental shelf sourrounding the Giglio Island (seismic profiles BS77-AT). The cruise has been carried out during two periods, one corresponding to the 4th - 30Th of April 1977 and the other to the 5th – 10Th of April 1976. Dr. Nevio Zitellini was part of the scientific team, A. Ferriani was part of the technical team. PI was the Dr. XXX.