INLAND ONLY A power driven vessel overtaking another in a narrow channel, and wishing to pass on the other vessel's port side, would sound a whistle signal of __________.

Correct Answer: Option D — two short blasts

Inland Rules 34(c)(i) state that an overtaking power-driven vessel desiring to pass on the other vessel's port side shall indicate this intention by sounding two short blasts on her whistle, distinct from international signal requirements.