Which of the following is NOT part of the standard navigational information that may be passed to a disoriented mariner?

• A. Charted hazards
• B. Characteristics of lights
• C. Charted buoy positions
• D. GPS coordinates of vessel

Answer: (D)

In distress guidance, the information shared to help a mariner find safe navigation focuses on fixed, environmental details you can use to understand your surroundings: charted hazards tell you what to avoid; lamp characteristics help you identify which light you’re seeing and estimate your position relative to shore; charted buoy positions show where safe channels and markers lie. The GPS coordinates of the vessel, however, are a dynamic detail about the transmitter’s own location and don’t describe the navigational features around the mariner. Sharing the vessel’s exact coordinates isn’t part of standard navigational information meant to aid a disoriented mariner, so that is the option that doesn’t fit.