On power driven vessels how should navigation lights be?

On power-driven vessels, navigation lights must be displayed in accordance with the International Regulations for Preventing Collisions at Sea (COLREGs). Typically, these vessels should show a white masthead light, red and green sidelights, and a sternlight when underway. The lights must be visible from specific angles and distances to ensure safe navigation and to signal the vessel's status to others. Proper use of navigation lights is crucial for preventing collisions during both day and night.