In what hours is water skiing prohibited?

Water skiing is prohibited from sunset to sunrise primarily for safety reasons. During these hours, visibility is significantly reduced, making it difficult for water skiers, boaters, and other watercraft operators to see each other. This increases the risk of accidents and collisions on the water. Additionally, the darkness can conceal hazards in the water, further contributing to the potential dangers.

The other options, while they may address conditions or times when it might be more appropriate to avoid water skiing, do not align with the established regulations regarding water skiing safety at night. For example, skiing when the water is choppy or during daylight hours might lead to other hazards, but they do not restrict skiing based on visibility concerns like the nighttime prohibition does.