Question 307General Subjects - 1st Asst/Chief

The correct answer is B) The fuel changeover is commenced BEFORE the vessel enters the SOx emissions control area to allow time for the high sulfur fuel to be flushed out of the fuel lines. This is the correct answer because vessels equipped to burn both high sulfur residual fuels and low sulfur distillate fuels must change over to the compliant low sulfur fuel before entering an SOx emissions control area. Commencing the fuel changeover process before entering the SOx emissions control area ensures that the high sulfur fuel is fully flushed from the fuel system and that the vessel is burning the required low sulfur fuel while within the SOx emissions control area. The other options are incorrect because A) and D) do not allow enough time for the fuel changeover process, while C) is too specific about the timing and location of the changeover.