In boating, what does "restricted visibility" refer to?

"Restricted visibility" refers to situations where a boater's ability to see is significantly hindered, primarily due to environmental factors such as fog, heavy rain, or other weather-related conditions. When visibility is limited, it becomes more challenging for operators to see other vessels, navigation aids, or potential hazards in the water. This term emphasizes the need for heightened caution and likely the need to adjust speed, navigation methods, and lookout practices to ensure safety on the water.

Conditions with clear weather do not represent restricted visibility, as clarity allows for effective navigation and safety measures to be followed. Nighttime conditions, while potentially presenting their own visibility challenges, do not automatically mean restricted visibility in the context of environmental factors affecting sight. Similarly, operational limitations of vessels are more concerned with a boat's speed, handling, and equipment rather than visibility-related concerns. Thus, B is the correct interpretation of what restricted visibility entails in boating.