COLREGs Rules of the Road Practice Test

Question: 1 / 400

What is the color of the port side light of a vessel?

Green

Red

The color of the port side light of a vessel is red. This is a standardized requirement set forth in the COLREGs (International Regulations for Preventing Collisions at Sea), which aims to establish clear and consistent rules for navigation and safety at sea. The port side light serves an important function in signaling a vessel's orientation and direction to other vessels, ensuring that they can identify the side of the vessel they are approaching.

When two vessels are navigating toward each other at night or in other low visibility conditions, the color of the side lights helps them determine who has the right of way. The red light on the port side and the green light on the starboard side work together to communicate this information effectively. Encountering a red light indicates that the other vessel is on the port side, and appropriate navigational decisions can be made in response.

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