A diver’s peeve; over 10 metres deep in the big blue, chewing on a regulator and watching your air drop faster than a pin-pricked balloon. To help you combat this qualm, we bring you nine tank-stretching techniques to save air.

Remember that the term decompression illness (DCI) includes both decompression sickness (DCS) resulting from dissolved nitrogen (or another inert gas) being eliminated from a diver’s body tissues; and arterial gas embolism (AGE) which is caused by air entering the arterial blood as a result of a burst lung.

It’s the worst feeling to feel incredibly peckish when you’re 20 metres below the blue surface. Like any physical activity, you need to put food into your body to keep your engine running, and keep you alert and strong during your dive. Here are six foods to eat before diving: