What is a necessary item for a boat to operate legally at night?

For a boat to operate legally at night, it is essential to have navigation lights on board. Navigation lights are critical for ensuring visibility and safety during nighttime operations, as they help to signal the presence, position, and direction of the vessel to other boats. These lights adhere to maritime regulations, which specify the types, color, and positioning required for different vessels, depending on size and type.

While other equipment such as emergency flares, sound signaling devices, and a first aid kit enhance safety and preparedness on the water, they do not serve the primary legal requirement for nighttime operation. Only navigation lights are specifically mandated to comply with safety regulations after dark, making them indispensable for nighttime navigation.