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. GPS satellite positions

Answer: (D)

When guiding a disoriented mariner, the information shared should help them identify their surroundings and avoid danger using fixed, chart-based references. Characteristics of lights let them recognize lighthouses and deduce position by comparing what they see with the chart. Charted hazards inform them where dangers lie so they can steer clear. Radio beacon frequencies let them tune in to safety signals and identify the relevant stations or aids to navigation in the area. GPS satellite positions are not part of this standard safety information because a mariner’s GPS receiver already determines position by processing signals from the satellites, rather than being given a separate list of satellite positions.