When encountering another vessel in darkness or reduced visibility, what do visible red and green lights indicate?

a) you are overtaking a sailboat

b)you are approaching a sailing vessel head-on

c) you are overtaking a powerboat

d) you are approaching the starboard side of a powerboat

Option (B)

Explanation: The green light and the red light plays a very important role in sailing on a vessel at night. The red light is present on the left and the green light is present on the right.

The red light refers to the port side of the boat whereas the green light refers to the starboard side of the boat.

Both this lights are used for communication between the sailors. It means that when there is the indication of this two lights, it depicts that there approaches a head-on sailing vessel and one should side past the other, giving a passage for another vessel to move without collision.

Thus, the correct answer is option (B).

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