Maintaining a proper lookout using human sight and hearing applies to boats under what circumstances?

Maintaining a proper lookout using human sight and hearing applies to all boats at all hours because it is a fundamental safety practice that is essential regardless of the time of day or environmental conditions. The lookout serves to help the operator detect other vessels, navigational hazards, and any changes in the waterway that may pose a risk. This practice is vital for preventing collisions and ensuring the safety of everyone on board as well as others in the vicinity.

In daylight, a lookout can spot other boats or obstacles easily, while at night or in restricted visibility, reliance on sight can be limited; thus, hearing becomes an even more crucial aspect of maintaining awareness. This principle is established as part of navigation rules, emphasizing that vigilance must be constant and not confined to specific circumstances. Proper lookouts ensure that boaters can respond quickly and effectively to any potential dangers they may encounter on the water.