Question 284Navigation General

The correct answer is D) yellow. The four standard light colors used for lighted aids to navigation are red, green, white, and yellow. This is in accordance with the U.S. Coast Guard's regulations and guidelines for the Uniform State Waterway Marking System (USWMS). The other answer choices are incorrect because blue, purple, and orange are not among the four standard light colors used for lighted aids to navigation. The USWMS specifically designates red, green, white, and yellow as the accepted colors for these navigational aids.