Which type of PFD is most effective at turning unconscious persons face up in the water?

The most effective type of personal flotation device (PFD) for turning unconscious persons face up in the water is a Type I PFD. This type of life jacket is designed specifically for maximum buoyancy and stability. It features a high collar and a design that helps keep the wearer’s head above water even when unconscious. Its construction allows for consistent flotation in a variety of water conditions, making it especially suitable for situations where a person may need to be rescued from the water.

In contrast to Type I, other PFD types such as Type II and Type III are more suitable for conscious individuals in calm waters and are not designed to reliably turn an unconscious person face up. Type IV is designed as a throwable device and does not provide the secure fit and support necessary for unconscious individuals. Therefore, when the goal is to ensure that an unconscious person remains in a safe, face-up position in the water, Type I PFDs are the optimal choice.