Maritime Operations
LNG Bunkering Explained: Vessels, Transfer Methods and Safety Considerations
The vessels, transfer methods and safety interfaces behind supplying LNG as a marine fuel.
What bunkering means here
Bunkering is the supply of LNG as fuel to a receiving vessel — a different activity from carrying LNG as cargo, even though the equipment looks similar.
Three methods dominate: ship-to-ship, truck-to-ship and terminal-to-ship. Each brings its own equipment, approvals and compatibility checks.
The vessels involved
Dedicated bunkering vessels, small-scale carriers and coastal barges all appear in this segment, frequently using Type C tanks.
Type C tanks are self-supporting pressure vessels commonly used in smaller LNG transport and bunkering applications. Their suitability depends on vessel size, cargo volume, operating profile, terminal infrastructure and project-specific design requirements.
Safety interfaces
Both parties are linked by an emergency shutdown arrangement, and transfer connections may include emergency release provisions if the vessels move beyond agreed limits.
Simultaneous operations — bunkering while cargo or passenger movements continue — require a specific risk assessment and port authority agreement.
Planning a transfer
Manifold position, fender plan, mooring arrangement and hose handling are confirmed for each receiving vessel before an operation begins.
Crew familiarity and drills matter as much as the hardware. Always follow the vessel's approved procedures and the port's requirements.
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- Status
- Educational overview — editorial review required
- Seeded educational summary awaiting editorial and technical review.
- 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.