What type of light may a power-driven vessel of less than 12 meters use?

A power-driven vessel that is less than 12 meters in length is allowed to use an all-around white light as its navigation light. This type of light is typically used while at anchor or not under command, as it provides visibility to other vessels. The all-around white light can be seen from all directions, ensuring that other mariners can easily identify the vessel’s position and status.

This usage adheres to the International Regulations for Preventing Collisions at Sea (COLREGs), which outline specific lighting requirements based on vessel size and type. For smaller vessels, using a simple light configuration promotes safety on the water without the increased complexity of additional navigation lights, which larger vessels might be required to display.

In contrast, the other lighting options mentioned do not conform to the regulations and specific requirements for vessels under 12 meters. For instance, a flashing white light is typically reserved for specific situations or signaling purposes, while an all-around red or green light is often associated with specific maritime functions that don’t apply to a vessel of this size or type engaged in general navigation.