How should vessels handle situations when they see both sidelights of another vessel off their bow?

In maritime navigation, seeing both sidelights of another vessel off your bow is a significant indication of that vessel's position and potential course. This situation typically suggests that the vessels are on a collision course. Therefore, it becomes crucial for the observing vessel to consider the risk of a collision.

Understanding that both sidelights are visible signifies that the other vessel is likely crossing your path from your starboard side to your port side, which increases the likelihood of a close-quarters situation. In such cases, it’s essential to take action to avoid potential collisions by assessing the situation carefully and making navigational decisions based on the risks involved.

Considering the risk of a collision allows the crew to evaluate options such as altering course, altering speed, or taking other appropriate actions to ensure safety on the water. This proactive decision-making is critical in the prevention of maritime accidents and is aligned with the fundamental principles of the "Rules of the Road," which guide mariners in avoiding collisions at sea.