United States Coast Guard Captains License Practice Exam

In a situation where two yellow lights in a vertical line are observed, what action should be taken?

1. Proceed with caution

2. Maintain course

3. Reduce speed

4. Change course

The correct answer is: Proceed with caution

When two yellow lights are observed in a vertical line, this signaling typically indicates a cautionary situation. It advises mariners to be alert for potential hazards or a change in navigational conditions. Proceeding with caution means that the vessel operator should be prepared to take further actions if necessary, such as adjusting speed or direction, based on the specific circumstances encountered. This interpretation aligns with the meaning of the lights as they serve to signal caution, alerting operators to be vigilant and watch for additional information or signals that may follow. It's a safety-oriented directive, ensuring that mariners avoid hazards and navigate safely, especially in areas where visibility or conditions may be compromised. This understanding is critical for both safe navigation and compliance with maritime regulations.