Question 730 Rules of the Road

The correct answer is D) southwest (225°). According to the navigation rules, a green sidelight indicates that the vessel is traveling from the starboard (right) side of an observer's vessel. This means the vessel with the green sidelight is heading in a southwesterly direction, or 225 degrees. The other answer choices are incorrect because a green sidelight cannot indicate a vessel heading northwest (315°), northeast (045°), or due east (090°). The vessel's heading must be in the southwesterly direction based on the position of the green sidelight.