Question 178 Rules of the Road

The correct answer is C) both sidelights of the vessel and her masthead light(s). In a head-on situation at night, you would see both the red and green sidelights, as well as the masthead light(s) of the approaching vessel. This is in accordance with the International Regulations for Preventing Collisions at Sea (COLREGS), which require vessels to display these lights to indicate their presence and course to other vessels. The other options are incorrect because: A) you would see both sidelights, not just one; B) two masthead lights are not required in a head-on situation; and D) you would see both sidelights, not just one sidelight.