| As a management level engineering officer on a motor vessel equipped with engines capable of burning both high sulfur content residual fuels and low sulfur content distillate fuels, on approaching arrival to a US port, for planning purposes, what must be done? |
| A) The fuel changeover is commenced precisely as the vessel enters the SOx emissions control area. |
| 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. |
| C) The fuel changeover is commenced approximately 1 nautical mile either side of the SOx emissions control area. |
| D) The fuel changeover is commenced AFTER the vessel enters the SOx emissions control area to allow time for the high sulfur fuel to be flushed out of the fuel lines. |
