Structure where the full weight is supported by buoyancy. [ISO 19900:2002] NOTE The full weight includes lightship weight, mooring system pre-tension, riser pre-tension, operating weight, etc.
Source: ISO 19901-7:2013, Petroleum and natural gas industries – Specific requirements for offshore structures – Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units. Global Standards
Source: ISO 19900:2013, Petroleum and natural gas industries – General requirements for offshore structures. Global Standards