What type of light can be exhibited during the hours of darkness according to maritime regulations?

During the hours of darkness, maritime regulations stipulate that vessels must exhibit specified navigation lights to ensure safe navigation and to signal their presence and status to other vessels. This requirement is critical for preventing collisions at sea, as these lights indicate the type, heading, and activity of the vessel.

Exhibiting only the specified navigation lights ensures that the vessel is visible while complies with the International Regulations for Preventing Collisions at Sea (COLREGs). These lights, which include sidelights, a stern light, and a masthead light, must be shown in accordance with the vessel's size and type.

Using any other types of lights, such as flashing or emergency lights, without complying with the regulations could lead to confusion and increase the risk of accidents, as these lights do not convey the necessary information regarding the vessel's direction or status.

Therefore, adhering to the guideline of showing no lights except the specified navigation lights is essential for safe maritime operations during darkness.