Question 508Rules of the Road90% to pass
BOTH INTERNATIONAL & INLAND You are heading due east (090°) and observe a vessel's red sidelight on your port beam. Which direction may the vessel be heading?
AI Explanation
The correct answer is C) southwest (225°).
According to the International Regulations for Preventing Collisions at Sea (COLREGS), if you observe a vessel's red sidelight on your port beam, it means the vessel is traveling in a direction between 112.5° and 247.5° relative to your own course, which includes the southwest (225°) direction.
The other options are incorrect because a vessel with its red sidelight visible on your port beam cannot be heading northeast (045°) or northwest (315°), as these directions would place the vessel's red sidelight on your starboard side. The vessel also cannot be heading southeast (135°), as this would place the red sidelight directly ahead of you, not on your port beam.
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