Question 420 Rules of the Road

The correct answer is D) None of the above. The reason this is the correct answer is that the scenario describes two vessels meeting on a river and passing 1/4 mile apart, which is an "International" navigation situation. In this case, the vessels would need to display the standard navigation lights required by the International Regulations for Preventing Collisions at Sea (COLREGS), not any special flashing lights. The other answer choices (flashing blue light, special flashing yellow light, two yellow towing lights) are not standard COLREGS navigation lights and would not be displayed by a vessel in this situation. Therefore, the correct answer is that you would not see any of those lights on vessel "B" if you were on vessel "A".