What is the significance of displaying navigation lights on a vessel?

Displaying navigation lights on a vessel is crucial because they indicate the vessel's position, heading, and status. These lights serve essential functions in ensuring safety on the water, especially during low visibility conditions such as at night or in fog.

Navigation lights are standardized according to international regulations, which means that different colors and positions communicate specific information about the vessel's movement and orientation to other watercraft. For example, a green light on the starboard (right) side and a red light on the port (left) side indicate the direction a vessel is facing and whether it is approaching or being overtaken. Additionally, the white masthead light indicates that the vessel is underway. By displaying the correct navigation lights, vessels can avoid collisions and ensure that all operators have a clear understanding of each other's movements on the water.

In contrast to the other options, which do not accurately reflect the primary purpose of navigation lights, the correct choice highlights their essential role in maritime safety and communication.