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

• A. Characteristics of lights
• B. Charted hazards
• C. Radio beacon frequencies
• D. Underwater hull inspection reports

Answer: (D)

Navigational information shared with a disoriented mariner focuses on external cues that help reorient and avoid danger. You’d expect to receive details about light characteristics (to identify lighthouses and buoy lights), charted hazards (so you know where dangers lie on the chart), and radio beacon frequencies (to tune into navigational signals and determine your position or direction). An underwater hull inspection report, describing the vessel’s hull condition and any defects, isn’t used to guide someone at sea in terms of location or safe routing, so it isn’t part of the standard navigational information passed to a disoriented mariner.