What can hunters and fishermen use to enhance their visibility if they fall overboard?

Brightly colored personal flotation devices (PFDs) are ideal for enhancing visibility in the water if a person falls overboard. The bright colors are specifically designed to stand out against the natural colors of the water and the surroundings, making it easier for rescuers to spot someone in distress. The visibility of a person in the water is critical for their safety, as it increases the chances of being located and rescued quickly.

Heavy clothing, while it may provide warmth, does not contribute to visibility and can actually hinder a person's ability to swim or stay afloat. Dark sunglasses can impair visibility and are not useful in helping others spot an individual in the water. Waterproof bags are practical for keeping items dry, but they do not enhance visibility for the person who has fallen overboard. Thus, bright colors on PFDs serve a crucial purpose in ensuring that anyone in the water can be seen easily, which enhances safety during a potential emergency.