Bathymetry and satellite gravimetry from the literature, i.e., JOHNSON1973, SCLATER1976 and SANDWELL1997 already highlighted the main morphological structure of the south Atlantic around the Bouvet Triple Junction. Our new high-resolution morphobathymetry data cover the area from about 53S to 55:50'S, and 4W to 5:4OE (Fig. 3). The Bouvet region can be divided into four main areas, namely (a) the southernmost segment of the MAR, (b) the westernmost segment of the SWIR, (c) the easternmost segment of the AAR and (d) the Triple Junction area s.s.