It is only a frightening experience to have to rescue an injured diver, but in many cases, it can also be physically difficult, or even impossible, to lift the stricken diver out of the water.

How do you, for example, lift a heavy diver into a boat, onto a dock or up a steep shore? Those who have tried it, either for real or during exercises, will know what I am talking about.

Unless there are many people to help in the event of an accident, it can be almost prohibitive, or take too many precious minutes.