What is the function of a PFD's buoyancy?

The function of a PFD's buoyancy is to help keep a person afloat in water. This is the primary purpose of Personal Flotation Devices (PFDs). When a person enters the water, the buoyancy provided by the PFD ensures that they stay on the surface, reducing the risk of drowning. The design and materials used in PFDs are specifically intended to provide this crucial support, allowing individuals to maintain their head above water even if they become unconscious or unable to swim.

While PFDs do offer some level of insulation and can provide warmth, they are not primarily designed to protect against hypothermia. Additionally, although wearing a PFD can support swimming, it doesn’t inherently increase a person’s swimming ability or speed. The focus of a PFD’s buoyancy is solely on enhancing safety by keeping the wearer buoyant and preventing them from sinking.