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Table 2 NOx emission reduction programme

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

Tier Date NOx limit [g/kwh]
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 2016a 3.4 9 × n-0.2 1.96
  1. n = engine speed [rpm]
  2. aonly for NOx ECAs (TIER II applies outside ECAs)
  3. Source: Burel et al. (2013)