Pontoons are used for various purposes: Pontoons with a capacity between 1,500 and 9,500 tones are deployed for transporting and dumping rocks for the construction of breakwaters, etc. The deck of these pontoons is reinforced with a sandwichdeck (steel and concrete) of 20 cm so as to limit the damage when loading rocks.

Pontoons are used as work platforms for water works. Cranes are placed on deck. Spuds or winches and anchors make sure that the pontoon stays in position. If necessary, a pontoon can be equipped with accommodation.

Smaller pontoons with winches are used for anchoring and positioning floating pipelines. The fleet also includes some specific pontoons: dynamically positioned spray pontoons, dismountable pontoons, mooring pontoons, pontoons used as floating quay, etc.