Class 2 (2nd Engineer) SSEP 📅 Nov 2023

Exam Question

(a) Briefly describe the environmental impact of NOx and SOx and allowable limitations are per Annex VI of MARPOL in emission control areas and outside emission control areas. (10)

(b) Briefly describe methods to control NOx emission. (10)

Reference Answer

(a) NOx and SOx – Environmental Impact and MARPOL Annex VI Emission Limits
NOx and SOx emissions from ships contribute significantly to air pollution, human health issues, and marine environmental degradation. MARPOL Annex VI regulates these emissions, with stricter limits in Emission Control Areas (ECAs) compared to open seas.
SOx ECAs: Maximum fuel sulfur content = 0.10% m/m .
Outside ECAs (open waters): Maximum fuel sulfur content = 0.50% m/m .

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