The safety features of a buoy.

What order to dive in, and who looks after whom.

How to look after a diver from the surface.

How to perform a rescue as the safety on the surface.

How to choose the correct amount of weight to wear.

How diving "freestyle" can improve your safety.

Take 3 of these breaths after every freedive.

How to avoid pressure-related injuries to your ears, sinuses, eyes and lungs.

The vast majority of blackouts happen at, or close to, the surface.

Don't breathe rapidly and forcefully before a dive.