When must you maintain a proper lookout by sight and hearing while on a boat?

You must maintain a proper lookout by sight and hearing at all times while on a boat, especially in areas with other vessels, navigation hazards, or changing weather conditions. This practice is essential for ensuring safety and avoiding collisions. A proper lookout allows operators to detect potential dangers and respond appropriately to them in a timely manner. It is a fundamental responsibility under maritime law and safe boating practices.