LNG Carrier CII

LNG carriers use a unique MEPC.337 reference line (a=9827, c=0) - flat in capacity. Boil-off gas consumption is CH₄-slip-corrected via MEPC.364(79) Cf for LNG.

Ship typeLNG carrier

Loading calculator…

This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\text{CII}_\text{required} = 9827 \cdot \text{DWT}^{0} \cdot (1 - Z) = 9827 \cdot (1 - Z)

Symbol	Meaning	Unit
$DWT$	Deadweight	t
$Z$	Annual reduction	fraction

Source: IMO Resolution MEPC.337/338/339(76) - LNG carrier reference; MEPC.364(79) - LNG Cf with methane slip; SIGTTO - LNG carrier operational standards

In short

CII rating for LNG carriers using the unique flat MEPC.337 LNG reference line (a=9827, c=0).

Learn the theory Gas Carrier Types: LPG and LNG Ship Classes