You want to learn about the underwater world and go familiar with the dolphins (which is neither polite, nor useful, nor very secure) well, you should make sure you know two or three things about this discipline / passion what is diving before getting started. Of course don’t think it’s an absolutely horrible thing, if it’s done by being well supervised it can be wonderful, but you still have to be careful.
1. The pressure on the body can cause several types of accidents
Accidents related to pressure on the body are called barotraumas and they affect the eardrums or sinuses. In order to avoid these problems as much as possible, we must do the Valsalva maneuver which consists in balancing the pressure between the ears and the outside. This maneuver is done during the descent by blocking the nose and closing the mouth while exhaling.
2. You have to be very careful when going through the decompression stops
The decompression stops are the limits of depths at which one must “stagnate” to accustom his body to the pressure. Depending on the location of the dive and the duration of the session, you can go through several stages of a few minutes to avoid problems. It is essential to mark these levels during the descent and the ascent so as not to cause shocks and eliminate the nitrogen present in the body at the risk of it subsequently clogging the blood vessels and causing thrombosis, paralysis and other serious disorders.
3. Flying before or after a dive session can be fatal
There are several rules to follow when you have to dive between one or two plane flights. Depending on the depth where you are going to descend, you have to wait several hours to avoid the inconvenience known as decompression sickness (ADD) and which can, in the most serious form, be fatal.
4. Oxygen becomes toxic at a certain depth
Going deeper than twenty meters, the oxygen that we breathe in the bottles becomes partly toxic. In the most serious cases the nervous system and the lungs can be affected and cause death, which is why it is essential to follow the instructions and notify the person in charge directly if a strange sensation is felt.
5. Stress can quickly become dangerous
Depending on the depth or the state of mind of the diver, the stress felt can quickly become problematic. Anxiety and stress attacks are often synonymous with breathing problems, which quite logically represents a significant risk in depth. Breathing too fast could increase carbon dioxide in the body and cause fainting. Always alert the person supervising the dive at the slightest onset of stress and always remain calm.
6. Pre-Existing Heart Problems Can Become Deadly
This is a big problem that can sometimes cause death, people with heart problems that they are not necessarily aware of can have cardiovascular complications. It happens more often to middle-aged people and while diving does not directly create heart problems it can increase the risk in people with predispositions.
7. You can be a victim of nitrogen narcosis (the drunkenness of the depths)
The excess of nitrogen which becomes toxic in depth can play on the nervous system in a significant way. Nitrogen narcosis can appear from 30m depth and is almost guaranteed below 60m. The effects that can occur are varied, feeling of inner speech, anxiety, euphoria, hallucinations, thoughtless actions (divers remove their masks)…
8. One can also be a victim of Nervous High Pressure Syndrome (HPNS)
By staying too long in a deep dive and breathing heliox, a diver can experience this other equally serious syndrome. The effects are also varied: you can feel nausea, confusion, vomit, difficulty moving or thinking… The depth at which this syndrome occurs being high, it does not happen to occasional divers but rather to professionals and accustomed.
9. There are very scary places like the Mariana Trench
It is the deepest place listed in the oceans, populated by many creatures, many of which are unlisted. There are a lot of things to know about the Mariana Trench but we prefer to read them rather than discover them ourselves. Otherwise you can also go to see the most dangerous dive sites.
10. The ocean is a huge graveyard
As you can easily imagine, the seabed is strewn with more or less ancient corpses, in 2014 divers found the corpse of a woman over 12,000 years old in an underwater cave to give you an idea. That in addition to the wreckage of ships and planes, there is bound to be a significant number of human bodies and skeletons in the depths.
11. Wreck diving can be quite dangerous
There are an estimated three million shipwrecks on the ocean floor and wreck diving has quickly become a sub-genre of diving in many places around the globe. We can therefore visit these rather creepy remains during getaways, but not without risk: people can get lost during an exploration, find themselves trapped or knock their equipment against the walls and damage their equipment.
12. It is mostly totally dark in the depths
To get an idea of how much we see nothing and know nothing about the abyssal depths, tell yourself that the moon is much better mapped than these. Nearly 95% of the seabed remains unexplored, we don’t know what lives there, what shapes they have, what temperature it is there and a whole bunch of other stuff. Obviously we are talking about places that are too deep to dive without underwater vehicles, but still.
13. There are a lot of creepy creatures you can come across
While tropical fish are beautiful and friendly, there are a whole host of other creatures discovered (or not) in the depths that can prove to be much less friendly or even fatally dangerous. Enough not to make you want to go and venture into certain parts without taking the appropriate precautions.
14. You can get hypothermia (and die of it)
Bad equipment or rapid change in temperature, hypothermia can happen during a diving session and become dramatic. The problem can worsen if the hypothermia becomes advanced, the circulation in the limbs will become less and less important because the brain will protect the organs to the detriment of the rest of the body. The risks of drowning in situations of advanced hypothermia may then become more probable.