ClassNK GF (Gas-Fuelled) Notation
ClassNK notation for ships using gas as primary fuel - certifies IGF Code compliance + additional GF-specific requirements.
Criteria
4/4
Status
GF (Gas-Fuelled) eligible
Formula, assumptions, and limits
ClassNK GF umbrellas LNG, LPG, methanol, ammonia - each with additional sub-notation (GF-LNG, GF-NH₃, etc.). IGF Code MSC.391(95) is the IMO baseline; class rules add detailed tank + piping scantling checks.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| International Code of Safety for Ships using Gases or other Low-flashpoint Fuels | - | MSC.391(95) |