Question 874 Rules of the Road

The correct answer is B) submarine cable laying. The day signal shown in illustration D006RR indicates that the vessel is engaged in a task that restricts its ability to maneuver, which is characteristic of a vessel involved in submarine cable laying operations. The International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules both require vessels restricted in their ability to maneuver, such as those engaged in submarine cable laying, to display this particular day signal. The other options are incorrect because fishing with trawling gear (A), mineclearance (C), and pilotage duty (D) are not activities that would typically require a vessel to display the day signal shown in the illustration.