Question 170 Rules of the Road

The correct answer is A) An all-round white light may be carried in lieu of the second masthead light and stern light. This is correct because under the Inland Navigation Rules, vessels on the Great Lakes are allowed to carry an all-round white light instead of the second masthead light and stern light that are typically required for other inland vessels. This provides an exemption for Great Lakes vessels from some standard lighting requirements. The other options are incorrect because B) Great Lakes vessels are not exempted from showing yellow towing lights, C) sidelights for vessels over 50 meters must have a visibility range of 3 miles, not 2 miles, and D) the forward masthead light is required for vessels under 150 meters on the Great Lakes.