What is considered a safe practice when operating a boat in foggy conditions?

Using radar and sound signals is considered a safe practice when operating a boat in foggy conditions because these tools enhance visibility and communication with other vessels. Fog significantly reduces visibility, making it difficult for boat operators to see other boats, navigation markers, or obstacles in the water.

Radar helps detect other vessels and land obstacles, even in low visibility situations, allowing for better situational awareness. Sound signals are crucial as they alert nearby boats of your presence and intentions, enabling safer navigation in conditions where sight is limited. This combination of technology and communication helps prevent collisions and ensures that boaters can navigate safely despite the challenges posed by fog.

The other options do not prioritize safety: maintaining high speed increases the risk of accidents, turning off navigation lights removes a crucial means of visibility to others, and closely following other boats without sufficient visibility can lead to dangerous situations.