What type of lights should be on display when a boat is anchored at night?

When a boat is anchored at night, it is necessary to display at least one all-round white light to ensure visibility to other vessels. This light serves as a warning to others that the boat is stationary and helps prevent collisions. The all-round white light should be visible from all directions, providing a clear indication of the boat's position.

Displaying no lights can pose significant risks, as other boats may not be aware of the anchored vessel, leading to potential accidents. Flashing colored lights are typically used for specific purposes, such as signaling or indicating distress, rather than for anchoring at night. The combination of two red lights and a green light does not conform to standard requirements for an anchored vessel's lighting and could cause confusion for other boaters.

Having the all-round white light is an important safety measure and is in accordance with navigational rules designed to promote safe boating practices.