Buoyancy Control

Mark 'Crowley' Russell explains the important difference between weight and mass and how it impacts on your diving

Some divers believe that extra weight keeps them safe by preventing them from floating to the surface - but the exact opposite is true, and excess weight can be dangerous for divers.

Buoyancy control is the most important aspect of learning to dive - former full-time instructor Mark 'Crowley' Russell gives us some pointers