INLAND ONLY You are overtaking another power-driven vessel in a narrow channel. The other vessel will have to move to allow you to pass. You wish to overtake the other vessel and leave her on your starboard side. What should be your first whistle signal?

Correct Answer: Option D — two short blasts

33 CFR 83.34(c)(i) (Inland Rule 34) dictates that an overtaking vessel intending to pass on the port side of the vessel being overtaken must sound two short blasts. This signal notifies the overtaken vessel of the intent to pass on the port side, requiring the overtaken vessel to move accordingly.