MARPOL Annex VI - NOx Tier II Limit

NOx emission limit for Tier II per MARPOL Annex VI Reg. 13 as a function of rated engine speed - the baseline cap for keel dates ≥ 2011-01-01.

NOxTier IIMARPOL VI

Rated engine speedrpm

NOx limit Tier II: 14.40g/kWh

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

NOx = \begin{cases} 14.4 \& n < 130 \ 44 n^{-0.23} \& 130 \leq n < 2000 \ 7.7 \& n \geq 2000 \end{cases}

Symbol	Meaning	Unit
$n$	Rated engine speed	rpm

Source: MARPOL Annex VI Reg. 13

In short

NOx emission limit for Tier II per MARPOL Annex VI Reg.

Learn the theory Baltic Sea SECA + NECA: MARPOL Annex VI emission control areas