Question 373 Rules of the Road

The correct answer is D) two short blasts. When overtaking another power-driven vessel in a narrow channel, the overtaking vessel must signal their intention to pass by sounding two short blasts. This whistle signal indicates that the overtaking vessel wishes to pass the other vessel on the starboard (right) side. The other vessel must then move to allow the overtaking vessel to pass safely. The other answer choices are incorrect because they do not properly signal the intention to overtake and pass on the starboard side. One short blast (A) is used for passing on the port (left) side, while the two-prolonged-blast signals (B and C) are used for other maneuvering situations, not specifically for overtaking.