The MARPOL legislative changes being introduced on 1 January 2020 mean that ships operating outside Emission Control Areas (ECAs) will have three options to achieve compliance, either by the use of exhaust gas abatement technology (‘scrubbers’) or by burning a fuel with maximum sulphur content of 0.50%mass or by burning LNG. To meet continuing legislation inside ECAs, ships will either have to use scrubbers or burn fuel
with maximum sulphur content of 0.10%mass or use LNG. Keeping this in mind...
http://mfame.guru/bp-marine-issues-imo-2020-guidelines-to-be-compliant-inside-ecas/