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. Ship logbook entries

Answer: (D)

When guiding a disoriented mariner, you provide navigational cues that help them identify their surroundings and avoid danger. The way to recognize a fixed aid is through its light characteristics—color and flash pattern—so they can confirm which beacon or light they’re seeing. Knowing charted hazards helps them steer clear of dangerous shoals, wrecks, or other obstacles shown on nautical charts. Radio beacon frequencies are useful because they let the mariner tune into navigational aids or distress channels to obtain location information or assistance. Ship logbook entries, on the other hand, are internal records of a vessel’s voyage and are not something typically broadcast or shared as navigational guidance to a mariner in distress.