Question

Underway at night, you see the red sidelight of a vessel well off your port bow. Which statement is TRUE?

A. You are required to alter course to the right.
B. You must stop engines.
C. You are on a collision course with the other vessel.
D. You may maintain course and speed.

Answer 1

Seeing a vessel's red sidelight at night suggests you have the right-of-way, so maintaining course and speed is generally acceptable while staying vigilant for collision risks.

Step-by-step explanation:

When underway at night, seeing the red sidelight of a vessel off your port bow indicates that you are observing another vessel's port side, which means the vessel is crossing from your left to your right. According to the maritime navigation rules, the vessel that sees the green light of the other should give way, so if you see the red light, you have the right-of-way. However, this does not necessarily mean you are on a collision course. The most acceptable action would be to maintain awareness, watch for any changes in bearing which may indicate a collision risk, and be prepared to take action if needed. The statement "You may maintain course and speed" is typically the correct answer unless the situation changes to indicate a risk of collision.