On power driven vessels what are the navigation lights?

Power-driven vessels must display specific navigation lights to indicate their presence and movement at night or in low visibility. Typically, they show a red light on the port side (left), a green light on the starboard side (right), and a white stern light at the rear. Additionally, a white masthead light is required, visible from ahead and at a distance. These lights help other vessels identify the type and direction of the power-driven vessel.