What does "restricted visibility" mean in boating?

"Restricted visibility" refers to conditions that limit visibility at sea, which is often due to environmental factors such as fog, heavy rain, or snow. In these conditions, the ability to see other vessels, navigational aids, or obstacles is significantly impaired, increasing the risk of collisions. Being aware of restricted visibility is crucial for boat operators, as they must take additional precautions, such as reducing speed, using fog horns, and keeping a close watch for nearby vessels to ensure safe navigation. Recognizing and adapting to restricted visibility conditions is essential for maintaining safety on the water.