Question 1851Navigation General

The correct answer is A) continue on the present course. When the upper and lower range lights are in a vertical line, it indicates that the vessel is on the correct course and should continue proceeding straight ahead. This is because range lights are designed to provide a visual reference for the vessel to stay on the proper course. As long as the lights remain in a vertical alignment, the vessel is following the intended navigation channel. The other options are incorrect because B) waiting until the lights are no longer in a vertical line would be unnecessary, C) coming right would take the vessel off the proper course, and D) coming left would also take the vessel off the intended course.