Question 234 Rules of the Road

The correct answer is D) Seeing both sidelights and masthead light of a vessel dead ahead. This is correct because in a head-on situation, you would see the sidelights (red and green) and the masthead light (white) of the vessel approaching you directly from the front. This indicates that the two vessels are on a collision course and need to take appropriate action to avoid a collision, as per the International Regulations for Preventing Collisions at Sea (COLREGS). The other options are incorrect because they do not accurately describe a head-on situation. Option A describes a towing vessel, which is a different situation. Option B describes only seeing the sidelights, which would not indicate a head-on situation. Option C is missing the masthead light, which is a key component of a head-on situation.