Définitions
1.NounA specialised marine vessel with good stability and seakeeping characteristics, often used in offshore roles such as oil drilling.
2.NounA tourist vessel that rides low in the water, with the majority of the vehicle submerged, with underwater windows.
3.NounA low-freeboard vessel, capable of being incidentally submerged, with the majority of the hull located underwater.
4.AdjectiveAlternative form of semi-submersible.