A proper lookout shall be maintained __________.

Maintaining a proper lookout at all times is a fundamental principle of maritime navigation, ensuring the safety of all vessels on the water. This requirement stems from the International Regulations for Preventing Collisions at Sea (COLREGs), which emphasize that a vigilant lookout must be kept in all conditions—day or night, clear weather or poor visibility. The purpose of this ongoing lookout is to observe other vessels, navigational hazards, and any changes in the environment that could affect the safety of the vessel and its crew.

While factors such as visibility and busy waterways can heighten the importance of maintaining a lookout, they do not negate the need for constant vigilance in every situation. Therefore, the expectation is that a proper lookout is a continuous responsibility, not limited to specific circumstances. This practice ultimately helps prevent collisions and ensures that mariners can react appropriately to challenges that may arise on the water.