Use of Exhaust Gas Cleaning Systems under the Merchant Shipping

Exhaust Gas Cleaning Systems (EGCS) in operation
Exceptional circumstance 1 - An EGCS suffers from transitory non-compliance (for example due to engine load fluctuation)

Exceptional circumstance 2 - Possible non-compliance with the SOx emission limits during the start up and shut down of the EGCS

Exceptional circumstance 3 - Accidental break down of the EGCS

Intent
6.1 This Marine Guidance Note does not provide, nor can it provide, detailed guidance on
when the UK would take enforcement action. Ultimately, this would be determined on a case
by case basis against the professional judgement of the surveyor or inspector and also the
acceptances by authorities of the ship’s ports of call and, as appropriate, flag State.