Buoyancy World is an artificial reef built hear one of local dive sites to reduce the pressure off the natural reef area so divers can practice their buoyancy and control before being ‘released’ onto the natural reef environment. It has proved a success since it was first deployed in 2010. In September 2011 we undertook an expansion of Buoyancy World with new structures to expand the site and make it more interesting. Here is the story of one of those structures.