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

• A. Magnetic or true bearings
• B. Charted hazards
• C. Radio beacon frequencies
• D. Satellite navigation error data

Answer: (D)

Disoriented mariners benefit from straightforward, actionable navigational cues that help them determine direction, avoid danger, and locate rescue resources. Magnetic or true bearings give a clear sense of where to head relative to a known point or landmark. Charted hazards warn what to steer clear of, helping to prevent running into rocks, shoals, or wrecks. Radio beacon frequencies allow the mariner to identify and tune to navigation aids or distress resources, aiding orientation and communication. Satellite navigation error data, however, is technical information about the GNSS system’s performance and integrity. It isn’t easily interpreted or directly useful for immediate navigation in a distress situation, and it isn’t typically broadcast as standard navigational information. For these reasons, satellite navigation error data is not part of the standard information passed to a disoriented mariner.