Your vessel is taking on bunkers from a shore side facility. If oil begins flowing from one tank vent, which of the following actions should be taken FIRST?

Correct Answer: Option C — Signal the shore control point to shutdown.

Immediate cessation of flow is the primary defense against pollution. Per 33 CFR 155.780, the Person in Charge (PIC) must ensure the transfer is stopped instantly if an overflow occurs. Signaling the shore facility is the fastest way to halt the pump and prevent further environmental discharge.