Naval Auxiliary Fuel & CO₂

Replenishment oilers, fleet tankers, sealift ships. Exempt from IMO regulation (Article 3.3 of MARPOL) but most navies now track CO₂ per steaming day as an internal metric - NATO Green Defence Framework.

Ship typeNaval

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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{CO}_2^\text{year} = \sum_j F_j \cdot C_{f,j}

Symbol	Meaning	Unit
$F_j$	Mass of fuel $j$	t
$C_{f,j}$	CO₂ factor	t CO₂ / t fuel
$Bench (Steaming days / year)$	operational benchmark	d
$d_\text{op}$	Operating days	d

Source: NATO - Green Defence Framework; IMO MEPC.364(79) - Cf conversion factors

In short

Replenishment oilers, fleet tankers, sealift ships.

Learn the theory Specialised Ship Types: Ro-ro, Reefer, Heavy-Lift