The survey has been carried out on board of the R/V Bannock - CNR. During the cruise, the main aim of which was the reconstruction of the geological and geodynamic evolution of the Tyrrhenian basin, 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 1015 nm and are organized in groups named after the investigated areas. The areas investigated during the survey T71, Leg II are: the eastern continental slope offshore Ponza and Capri (seismic profiles T71-SE); the northern Tyrrhenian slope (seismic profiles T71-SN ) and the abyssal plain (seismic profiles T71-PO) up to the 41° N; the southern part of the Montecristo Basin and the nearby Sardinia escarpment (seismic profiles T71-BS); and the northwestern part of the abyssal central-Tyrrhenian plain (seismic profiles T71-FC, seismic profiles T71-MC). The cruise has been carried out from 6th July to 3th August 1971. Prof. S. Rossi and Dr. E.F.K. Zarudzki were on board as part of the scientific team, and P. Ferretti and A. Ferriani were part of the technical team. PI was the Dr. A. Fabbri.