Self-supporting spherical tanks, instantly recognisable on the horizon.
- Operational role
- Conventional Ocean-Going LNG Carrier
- Containment system
- Moss / Spherical Self-Supporting Type B
- Capacity class
- Conventional (indicative: approximately 125,000–180,000 m³)
- Indicative capacity
- 125K–155K m³
- Tank geometry
- Independent spheres
- Typical application
- Long-haul ocean trades with frequent part-cargo operations
- Hull-space efficiency
- Lower — spheres leave unused volume in the hull form
- Infrastructure requirements
- Conventional deep-water LNG terminals with standard manifold spacing
- Propulsion options
- Steam turbine · DFDE / TFDE
- BOG management
- BOG as fuel · Gas combustion unit
- Advantages
- No filling-level restrictions, so partial cargoes are routine — Leak-before-failure tank design with excellent structural monitoring — Long, proven service record across four decades of trading
- Limitations
- Lower volumetric efficiency than membrane hulls of similar length — Large above-deck profile reduces visibility and increases wind load
- Typical routes
- Qatar – Japan · Australia – South Korea · Alaska – Japan