Answer:
A vessel operator is required to use navigation lights at all times under the listed conditions, however, the required lights vary for the different conditions listed. The various lights provide other vessel operators with important information.
Step-by-step explanation:
When moored at dock, the operator must display a white light visible in all directions as well as when anchored outside a designated mooring area between sunset and sunrise.
During a period of restricted visibility such as fog, operator must display Red and green sidelights visible from a distance of at least two miles away