Do the visibility rules apply in all conditions of visibility?

The visibility rules are fundamental components of the COLREGs (International Regulations for Preventing Collisions at Sea) and they apply in all conditions of visibility. This includes clear weather, fog, rain, or nighttime. The purpose of these rules is to ensure that vessels take appropriate actions to avoid collisions, regardless of the structural visibility conditions.

In low visibility situations, such as fog, there are additional requirements, like sound signaling, to help vessels determine their relative positions and detect each other. However, this does not exempt vessels from adhering to visibility rules in situations where visibility is clear. Similarly, during nighttime operations, vessels must still comply with the defined rules concerning their lights and shapes. Therefore, since the visibility rules are designed to promote safe navigation at all times, they are applicable universally, making the answer correct.