Definitions for "Buoyancy aid"
A waistcoat style jacket which is inserted with special closed cell foam to assist with buoyancy, and designed to help a swimmer stay afloat.
Also known as a PFD in some parts of the world, this is a type of life jacket designed primarily with sporting use in mind. They are generally only designed to hold a conscious person afloat, and are generally shaped to allow greater freedom of movement than a full lifejacket.
name given to any buoyant vest or jacket that does not have the righting action of a lifejacket - with the head up, but does provide buoyancy, for example a dinghy sailing vest.