The SARGASS cruise aimed to supplement knowledge about the sedimentary architecture and processes and the factors in the edification of large turbidite systems in the Bay of Biscay. The "Cap-Ferret" system to the south which stands out for its single large sedimentary levee developed at the foot of the Aquitaine margin, coming from two feeding canyons, one of which is only active at periods of low sea level, and the other which cuts very deeply into the continental shelf and remains active at high sea level. To the North, the Celtic and Armorican turbidite systems are fed by short canyons, mostly by glacial flow and show a more classic radial structure. The SARGASS cruise had two main parts. The first part consisted in multibeam bathymetry-imaging coverage associated with seismic reflection profiles (fast seismics) of the deep parts of the systems which had not yet been explored using modern tools. Surveying should focus on the entire distal zone of the Cap-Ferret system and at the tips of the Celtic and Armorican systems to characterize the distal spreading (sandy lobes) and their connection to the feeding systems. The second part aimed to define the fine-scale architecture of deposits in key sectors of the Capbreton canyon, to comprehend the erosion-depositional processes having an effect in the axis of the canyon, the role played by gravity-driven destabilizations on its flanks and the influence of the structural heritage in the formation and evolution of this meandering canyon. The analysis is based on SAR-PASISAR profiles acquisition supplemented by core sampling and Penfeld penetrometer measurements.