- Le Pourquoi Pas ? This multidisciplinary vessel, about 108 m long, can carry out hydrographic, deep-sea or coastal, geoscientific, physical, chemical and biological oceanographic missions and use the Institute's scientific equipment. During a mission, it is capable of alternately operating two heavy equipment vessels, such as the Nautile, Victor 6000 or a towed vessel. It can also carry out charters.

- L'Atalante, This multi-disciplinary vessel, about 85 m long, is designed for marine geosciences, physical oceanography and marine biology. It can operate the manned submersible Nautile (-6000m) and the remotely operated robot Victor 6000.

- La Thalassa, A 75-m long fisheries research vessel, is intended more particularly for fisheries research (population ecology, assessment of exploited species, study of the spatio-temporal distribution of resources, catch and product processing techniques). The vessel can also carry out other types of missions in physical oceanography or the occasional use of the remotely operated robot Victor 6000.

- Le Marion Dufresne, multipurpose research vessel mainly dedicated to palaeoclimatology as it is equipped with the Calypso corer