What factor can greatly increase the risk of accidents while boating?

Poor visibility significantly increases the risk of accidents while boating. When visibility is compromised—whether due to fog, rain, darkness, or obstructive landscape—boaters may struggle to see other vessels, navigational hazards, and changes in the conditions of the water. Reduced visibility can lead to collisions, groundings, or accidents because boaters are not able to react in time to avoid danger.

In contrast, calm waters and good weather conditions generally promote safer boating experiences by reducing the likelihood of capsizing and making it easier for boaters to navigate. The use of safety equipment, such as life jackets and signaling devices, also enhances safety and preparedness, further lowering the risk of accidents.