As Chief Engineer, what do you do to reduce your ship's emissions?
Short answer
| Pollutant | What I do |
|---|---|
| NOx | engine within its Technical File and Tier, good combustion, EGR or SCR in a NOx ECA |
| SOx and particulates | 0.50% or 0.10% fuel, timed changeover, or an approved scrubber; BDN and sample |
| ODS and VOCs | leak-tight refrigeration, no venting, ODS record book, tanker VOC plan |
| CO2 | EEXI, SEEMP and CII plan, DCS data, clean hull and propeller, trim, optimum steaming, waste-heat recovery |
- NOx (regulation 13): engines within their Technical File and Tier, Record Book of Engine Parameters, good combustion (timing, injectors, turbocharger, air cooler); EGR or SCR dosed in a NOx ECA.
- SOx (regulation 14): fuel not exceeding 0.50% m/m, 0.10% in an ECA, changeover before entry and logged; or an approved scrubber; BDN and sample (regulation 18).
- ODS (regulation 12) and VOCs (15): no new ODS, HCFCs phased out, leaks repaired, refrigerant recovered, ODS record book; the tanker VOC plan.
- CO2 (regulations 22 to 28): EEXI met by power limitation (EPL or ShaPoLi); SEEMP Part III CII plan; annual CII kept in an A to C rating; accurate DCS data.
- Practical levers: clean hull and propeller, optimum trim, optimum steaming and weather routeing with the master, main-engine efficiency, waste-heat recovery, idle machinery off, VFDs, no leaks, performance monitoring.
- Records (regulation 6): IAPP, EIAPP, Statement of Compliance, Record Book of Engine Parameters, ODS record, changeover and bunker records, SEEMP, EEXI Technical File.
Full answer
The full answer explains each point step by step, with the regulations and figures behind it and the discussion from other candidates. It is in the MEO Class I section of the Marine One forum, open to members enrolled for the MEO Class I exam.