Final answer:
Vessels operating between sunset and sunrise must have navigation lights, sound signals, and radar on board.
Step-by-step explanation:
Vessels operating between sunset and sunrise must have the following devices on board:
- Navigation Lights: These are lights that vessels use to indicate their presence, direction, and status to other vessels on the water. The specific lights required depend on the type and size of the vessel, but commonly include red and green sidelights, a white masthead light, and a white stern light.
- Sound Signals: Vessels must also have sound-producing devices, such as horns or whistles, to signal their intentions or warn other vessels in low visibility conditions.
- Radar: While not required for all vessels, radar is an important device for navigating in reduced visibility conditions, such as at night or in fog.