During the World Ocean circulation experiment, 100 MARVOR floats were launched  near 800 dbar mostly in the Brazil basin, within the framework of SAMBA (SubAntartic Motions in the Brazil bAsin).This experiment aimed at describing the absolute general circulation of the Antarctic Intermediate Water around 800 m depth in the South Atlantic. MARVOR floats cycled every 2 (or 3) months between their nominal depth and surface to transmit data via the ARGOS system and were programmed for 30 (or 20) cycles, i.e. a total life of 5 years.