Navigation lights must be displayed on power-driven vessels from sunset to sunrise and during restricted visibility, with green lights on port, red on starboard, and white lights at the bow and stern.
On power-driven vessels, navigation lights must be displayed from sunset to sunrise and during periods of restricted visibility, such as fog or heavy rain. It is essential to understand that navigation lights help in determining a vessel's size, type, and direction of movement.
The international regulations require these lights to follow a specific color and positioning: vessels must have a green light on the port (left) side and a red light on the starboard (right) side. Additionally, vessels are required to display a white light at the stern and another white light at the bow, which is known as the masthead light.