Which color light is displayed on the left side of a power-driven vessel's bow?

The correct answer is red, as it indicates the port side of a power-driven vessel. In navigation, vessels are required to display specific colored lights to communicate their position and direction to other boats, especially during nighttime or low visibility conditions.

The red light is installed on the left side of the bow and serves an essential role in maritime navigation laws. Just like the green light on the starboard side (the right side), the red light allows other vessels to determine the orientation of the boat, crucial for safe passing and collision avoidance. This system of colored lights helps establish a universally recognized means of communication among boats and is fundamental for maintaining safety on the water.