INLAND ONLY You are overtaking another power-driven vessel in a narrow channel, and you wish to overtake on the other vessel's port side. What whistle signal would you sound?

Correct Answer: Option B — two short blasts

Rule 34(c)(i) of the Inland Navigation Rules specifies that a vessel intending to overtake another in a narrow channel on the port side shall sound two short blasts. This signal indicates the intent to pass and requires the agreement of the vessel being overtaken before the maneuver commences.