Final answer:
When anchoring outside designated areas, you must display an all-around white light or anchor light, and potentially a day-shape during the day, to ensure visibility to others. Local maritime regulations should be checked for more specifics.
Step-by-step explanation:
When anchoring a boat outside of designated anchoring areas, it is critical to maintain visibility to other nearby boats. This typically involves displaying an all-around white light or anchor lights that can be seen from all directions to alert other boaters of your presence, especially from sunset to sunrise and during periods of restricted visibility. Some regions may also require a day shape, such as a black ball, to be displayed during daylight hours.
The precise requirements for lights and day shapes may vary by location and the size of the boat, hence it is essential to check the local maritime regulations or Coast Guard guidelines pertinent to the area where you are anchoring.