What lighting is required on power-driven vessels less than 39.4 feet in length?

Power-driven vessels less than 39.4 feet in length may use an all-round white light as an effective means of signaling their presence when underway at night. This type of lighting simplifies the requirements for smaller vessels, allowing them to use a single light source that can be seen from all directions.

The all-round white light must be visible for a certain distance, typically two nautical miles in most regulations, making it a practical choice for smaller vessels. It serves to indicate not only the position of the vessel but also its direction of travel. In harbor or at anchor, the vessel may also display this light to prevent collisions.

While larger vessels may require a combination of a masthead light and sternlight to define their presence clearly, the regulations for smaller power-driven boats offer more flexibility. This single all-round light helps streamline equipment needs and simplifies night operations for smaller boaters, enhancing safety through visibility without imposing complex lighting requirements.