Comparison tool

Compare LNG vessels and containment systems

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Moss

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

Technical information

Status
Educational overview
Last reviewed
15 September 2026
Source status
Sources pending editorial review.

Technical parameters are indicative and may vary by vessel design, generation, shipyard, operator and intended service.