Final answer:
Vessel operators maintain a proper lookout by watching and listening for potential hazards, using tools like binoculars for enhanced observation.
Explanation:
A vessel operator keeps a proper lookout by watching and listening for any potential hazards or obstacles in the water. This involves actively scanning the surroundings to ensure the safety of the vessel and everyone on board. Utilizing tools like binoculars can enhance the operator's ability to maintain a proper lookout.
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