Question 860 Rules of the Road

The correct answer is A) two diamonds in a vertical line. This is the correct shape that a dredge is required to exhibit during the day to indicate the side on which it is safe to pass, according to both the International and Inland Navigation Rules. The two diamonds in a vertical line signify that the dredge is restricted in its ability to maneuver, and vessels must pass on the side indicated by the shape. The other options are incorrect because they do not match the specific shape and configuration required by the regulations for a dredge during the day. A single black ball or two balls in a vertical line would not provide the necessary visual indication for safe passage.