LPG / Gas Carrier CII

CII for LPG/ethylene/ammonia gas carriers. MEPC.337 uses two reference lines depending on size: ≥ 65,000 DWT uses (14405.9, 0.622); < 65,000 DWT uses (8104, 0.639).

Ship typeGas carrier

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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} = a_\text{size} \cdot \text{DWT}^{-c_\text{size}} \cdot (1 - Z)

Symbol	Meaning	Unit
$Size band$	$a$	$c$
$≥ 65,000 DWT$	14,405.9	0.622
$< 65,000 DWT$	8,104	0.639

Source: IMO MEPC.337/338/339(76); SIGTTO - Gas carrier operational guidance

In short

CII for LPG, ethylene and ammonia gas carriers using the size-split MEPC.337 reference lines (≥ 65 kt and < 65 kt DWT).

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