What is the 120 rule in diving?
Subtract the depth you’re diving (in feet) from 120. The resulting number is the maximum amount of minutes you should spend at that depth. Divers need to have healthy lungs and a strong heart to handle the pressures of diving and the physical exertion involved. Individuals with heart problems, such as arrhythmias or a history of heart attacks, should avoid diving, as the underwater environment can exacerbate these issues.Even when you are under the water’s surface, you need to breathe like you normally do. Never hold air in your lungs as it may result in rupturing them from too much gas. The chances are even more during an ascent. Don’t go alone for a dive and take someone with you.Never hold your breath. This is undoubtedly by far the most crucial of all safety rules for diving because failure to adhere could result in fatality. If you hold your breath underwater at the depths at which scuba divers reach then the fluctuating pressure of air in your lungs can rupture the lung walls.The Rules of Scuba Diving: Never Hold Your Breath. Plan Your Dive. Dive Within Your Limits.For recreational SCUBA diving, 130 feet is the absolute maximum depth to dive without decompression stops. Of course, things are not as simple as that.
What is the golden rule of diving?
Never hold your breath. This is undoubtedly by far the most crucial of all safety rules for diving because failure to adhere could result in fatality. If you hold your breath underwater at the depths at which scuba divers reach then the fluctuating pressure of air in your lungs can rupture the lung walls. Diving on a single breath of air reduces the volume of air in the lungs. This can cause swelling of the mucosal tissue (mucosal edema), bloating of the blood vessels (vascular engorgement), and even lung hemorrhage, resulting in lung squeeze injury.Diving does entail some risk. Not to frighten you, but these risks include decompression sickness (DCS, the “bends”), arterial air embolism, and of course drowning. There are also effects of diving, such as nitrogen narcosis, that can contribute to the cause of these problems.Never Hold Your Breath The effects of water pressure mean the air inside your lungs expands when you ascend, and not releasing it can cause lung injuries. Keep breathing normally throughout your dive, and you’ll also feel calmer and use less gas than if you hold your breath.As we’ve seen, as you descend on a dive, the increased pressure causes the volume of air in your lungs to decrease. But as this happens, the partial pressure of the air inside your lungs increases. This means that there is a greater concentration of oxygen and other gases in our lungs than there is in the blood.Individuals should not dive if they have cardiac disease that might result in incapacity underwater (e. IPO (e. DCS (e.
What is the 3r rule diving?
The 1/3 rule, also called the Rule of Thirds, states that you should use one-third of your air supply to descend into the water, one-third for the actual dive, and save one-third for your ascent back to the surface. The Rule of Thirds is a guideline used by scuba divers to manage their air supply effectively throughout a dive. It involves mentally dividing one’s breathing gas supply into three equal parts. One-third for the outward journey, one-third for the return journey, and one-third as a reserve or emergency supply.
What is the 2nd rule of scuba?
Equalise early and often while descending. Never go deeper than you can comfortably equalise. It is common sense, but many divers forget this rule and take the risk to burst an ear drum. Never hold your breath. This is undoubtedly by far the most crucial of all safety rules for diving because failure to adhere could result in fatality. If you hold your breath underwater at the depths at which scuba divers reach then the fluctuating pressure of air in your lungs can rupture the lung walls.Always breathe continuously. Never hold your breath. As I mentioned earlier, this is arguably the “number one rule” of scuba because breath holding while scuba diving can lead to serious injury, even death.In entry-level courses, divers learn how to equalize pressure in their ears, but ear barotrauma is still the most common diving injury.
Who should not scuba dive?
Underlying respiratory conditions (e. A study found that divers who smoke are more likely to have serious problems from “the bends” (decompression sickness). They’re also more likely to have trouble breathing and lung problems when diving.A person with heart trouble, a current cold or congestion, epilepsy, asthma, a severe medical problem, or is who under the influence of alcohol or drugs, should not dive.The most frequent known root cause for diving fatalities is running out of, or low on, breathing gas, but the reasons for this are not specified, probably due to lack of data. Other factors cited include buoyancy control, entanglement or entrapment, rough water, equipment misuse or problems and emergency ascent.Normal, well functioning lungs are essential for safe diving to minimise the chance of pulmonary barotrauma (burst lungs). The simple advice is to STOP SMOKING.It is also advised to avoid going up mountains that are higher than 1,000ft (300m) for 24 hours after diving. For the same reasons as flying; The altitude is higher than at sea level, which creates an increased difference in pressure between your surroundings and the nitrogen in your body from the dive.