Personal flotation devices (PFD) are wearable or throwable flotation devices used to keep a person afloat in water. They are used on all recreational, commercial and military watercraft as well as on ...

Students test the inflated bag as a possible flotation device for a model cell phone made of clay. Students will test smaller amounts of citric acid and baking soda to determine the optimum amounts ...

There are a host of different types and styles of life jackets, or PFD (Personal Floatation Devices) on the market. They come with different ratings based on the level of buoyancy they deliver.

Though he had signs of hypothermia, the man was able to swim to a shoal and await rescue thanks to his brightly coloured PFD.