Which of the following is true regarding the use of navigation lights?

The use of navigation lights is an essential component of safe boating, as they serve to indicate a vessel's position and direction to other boats and ships, especially in low visibility conditions. By helping to communicate a vessel's heading, size, and activity, navigation lights play a crucial role in preventing collisions on the water. For example, a red light indicates the port side of the vessel, while a green light indicates the starboard side, and a white light is often used to indicate the direction of movement. This function is critical regardless of the time of day or weather conditions, ensuring that mariners remain aware of one another's movements on the water.

In contrast, the other options do not accurately reflect the necessity or functionality of navigation lights. Navigation lights are not limited to use only at night, nor are they optional under adverse weather conditions, as visibility can be compromised in such scenarios. Additionally, while small vessels may have fewer requirements than larger vessels, they are still required to display appropriate navigation lights to ensure safety on the water.