Figure 1 : (Upper) Map of SW Indian Ocean, showing land masses, subsea features (3000m depth contour in blue) and principal current systems. BATHYMETRIC FEATURES: AP - Agulhas Plateau; MozR - Mozambique Ridge; MadR - Madagascar Ridge; MasR - Mascarene Ridge / CURRENTS: AC - Agulhas Current; AR - Agulhas Retroflection; ARC - Agulhas Return Current; EMC - East Madagascar Current; EMR - East Madagascar Retroflection; MCE - Mozambique Channel Eddy; NMC - North Madagascar Current. (Lower) R.m.s. variability of sea surface height (indicative of variable currents).