Journal of Shipping and Trade

Table 2 NO_x emission reduction programme

From: Investment decisions under uncertainty on LNG-powered vessels for environmental compliance

Tier	Date	NO_x limit [g/kwh]
Tier	Date	n<130	130 ≤ n ≥ 2000	n ≥ 2000
Tier I	2000	17.0	45 × n^-0.2	9.8
Tier II	2011	14.4	44 × n^-0.23	7.7
Tier III	2016^a	3.4	9 × n^-0.2	1.96

n = engine speed [rpm]
^aonly for NO_x ECAs (TIER II applies outside ECAs)
Source: Burel et al. (2013)

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