Why do divers jump from behind into the water?

The Backward Roll Explained Divers enter the water in a few different ways, but one of the most common is called the ‘backward roll entry’, ‘back entry’ or ‘backroll’. This is when the diver sits on the edge of a small dingy or zodiac boat, holds onto their regulator mouthpiece and simply allows gravity to carry them underwater.

Explanation:

polar areas, such as antarctica or the south pole.