The safety rules of scuba diving 

You are already a snorkeler, but you want to move on to the next stage and try SCUBA diving. Making this step requires serious training. Here are Decathlon’s tips on how to go SCUBA diving in complete safety.

SCUBA diving safety rules subea decathlon

SCUBA divers are faced with a number of hazards, many of which are related to the weather conditions or the marine environment. And your movements underwater must also be taken into consideration. To go SCUBA diving in peace of mind, here are some essential preventive tips.

SCUBA diving safety rules health subea decathlon

You must be in good health

This is an obvious rule that you must never forget! To avoid any unfortunate incidents, and for your own well-being, never dive if your are following a course of medical treatment, if you are short of sleep or if you are ill. Never take any risks that could result in a diving accident... ~Also, take an annual medical check-up and dental check-up to avoid any problems with your teeth.

Protect yourself against decompression accidents

When you go SCUBA diving, the nitrogen that enters your respiratory system is sometimes difficult to evacuate, even on the surface. To avoid this phenomenon, return to the surface at the appropriate speed by following your instructor’s guidance and taking care to breathe out properly. Remember to eat and drink enough before and after diving. Also, protection against the cold, once you are in the water, is essential. ~Difficulty in sleeping, back pains, the inability to urinate and other sensory and/or functional problems are all forms of warning!


Avoid getting short of breath 

You can run out of breath when your respiratory frequency rises to the point of panting. If this happens, stay calm and focus your efforts on breathing out. Irrespective of the reason why you are short of breath! This feeling can be caused by excessive efforts, deep anxiety caused by poor visibility, a regulator that is too stiff, a wetsuit that is too tight or hypothermia.~To overcome this phenomenon, it is necessary to take very deep breaths (0.8 to 1l), stay in control of your movements and breathe out.

SCUBA diving safety rules preventing shortness of breath subea decathlon

Anticipate air supply failures

SCUBA divers are very wary of air supply failures, even if they rarely occur. Stay vigilant at all times, keep a close eye on the pressure of your air tank in the centre, on the boat and when underwater, at regular intervals. Your octopus must be in the right place and inform your instructor when you reach half-pressure, so that you can start your return to the boat. Also, stay close to your partner. If you feel faint or your equipment fails, your partner can share their air with you.


SCUBA air diving safety rules air supply failure subea decathlon

Reduce the risk of barotrauma

Barotrauma is caused by alterations to the volume of air in your body under the effect of pressure. There are ways of combatting these effects:~- When descending: if you blow into your mask, it must never be so tight that it becomes tuck to your face, before regularly balancing your ears without any discomfort appearing. Pay attention to the speed at which you dive, and never overdo it! If the problems persist, ascend slightly to find relief and balance. If necessary, blow your nose to empty your sinuses.~When ascending: usually, you do not have to do anything in particular. The air escapes naturally from your ears, your sinuses and the mask. You will naturally prevent overpressure in your lungs, while avoiding apnoea and controlling the speed at which you return to the surface by breathing out properly.

Controlling the risks inherent in your diving equipment

Make sure that your buoyancy vest is in good condition. If not, it will not be buoyant, especially if the vest fills up with water. A faulty direct system (DS) that does not inflate properly will prevent you from remaining buoyant and controlling your ascent speed!

You also need to check a number of points on your regulator. If it is too stiff, loose or subject to leaking, it can result in shortness of breath, air supply failures or stressful situations. It needs to supply just the air that you need. Otherwise, you will consume far too much air, and the risk of shortness of breath will be multiplied.

SCUBA diving safety rules equipment maintenance subea decathlon

Keep your equipment in good condition to avoid diving accidents

Your equipment keeps you alive underwater. Take the time to carefully read the instructions and always keep it in good condition.


Buoyancy vests

Before you go diving, visually inspect your buoyancy vest. Check that it is watertight and also check the DS inflator. Fully inflate it until the release valves open automatically. Then, wait for a few seconds and check for leaks. Also, remember to check that the quick-release valves and the direct system (DS) function correctly.

When underwater, avoid contact with the seabed and rocks to protect your vest and avoid tearing. After the dive, rinse your vest in fresh water and dry it in the shade.

SCUBA diving safety rules buoyancy vest maintenance subea decathlon
SCUBA diving safety rules regulator maintenance subea decathlon


It is important to keep your regulator safe when travelling by putting it in a suitable diving bag. The second stages and the pressure gauge must be kept in the pocket of your buoyancy vest on the boat so that they are not left loose when you dive. After your diving trip at sea, soak the plug in water with some disinfectant for 10 minutes, then dry away from sunlight.~~If your equipment leaks or becomes hard, ask our after-sales service to check it. And just like your buoyancy vest, your equipment must imperatively be serviced once a year.

baptiste digital manager subea decathlon


Digital manager - padi rescue and level 1 ffessm

I'm Subea's Digital Manager. I'm passionate about spear fishing and free diving, and have been scuba diving for over fifteen years. I dive alone down to 60 meters.