NOx emission limit for Tier III (ECA) per MARPOL Annex VI Reg. 13 - keel dates ≥ 2016-01-01 operating in North American / US Caribbean / Baltic / North Sea ECAs.
Formula
$$ NOx = \begin{cases} 3.4 & n < 130 \\ 9 n^{-0.2} & 130 \leq n < 2000 \\ 2.0 & n \geq 2000 \end{cases} $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $n$ | Rated engine speed | rpm | engine nameplate |
Sources
- MARPOL Annex VI Reg. 13.5.