What are the two golden rules when scuba diving?
The Rules of Scuba Diving: Never Hold Your Breath. Plan Your Dive. Dive Within Your Limits. Scuba diving typically involves moderate intensity physical activity, but situations can occur that require high-intensity activity. In addition, scuba diving challenges the cardiovascular system in a variety of ways that may be life-threatening for individuals with heart disease or a low capacity for exercise.The side effects of seasickness, nerves, or even an unpleasant meal can still take hold at depth, and many divers wonder what to do if you throw up while scuba diving. If you feel the need to vomit, the best thing you can do is hold your regulator in and let your body do what it needs to do.Decompression sickness and arterial gas embolism in recreational diving are associated with certain demographic, environmental, and dive style factors.Scuba diving requires heavy exertion. The diver must be free of significant cardiovascular and respiratory disease. An absolute requirement is the ability of the lungs, middle ear, and sinuses to equalize pressure. Any condition that risks the loss of consciousness must disqualify the applicant.Divers can only spend around 12 minutes under water at a time to help avoid decompression sickness.
What is the most common injury in scuba diving?
The most common injury in divers is middle ear barotrauma, or middle ear squeeze (Box 3. The most common injury in divers is middle ear barotrauma, or middle ear squeeze (Box 3. On descent, failure to equalize pressure changes within the middle ear space creates a pressure gradient across the eardrum.The most common injury in divers is middle ear barotrauma, or middle ear squeeze (Box 3.
What is the 1/3 rule in scuba 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. In technical diving, the 1/3 Rule ensures divers have enough gas for the descent, return, and emergencies. It divides the total gas supply into three parts: one-third for the descent and exploration, one-third for the return, and one-third as a reserve, enhancing safety in challenging environments.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.
Who should avoid scuba diving?
Individuals should not dive if they have cardiac disease that might result in incapacity underwater (e. IPO (e. DCS (e. Medical Conditions and Diving Risks Individuals with epilepsy, for example, should avoid diving due to the potential for seizures underwater, which can be life-threatening. Similarly, those with asthma may face challenges with breathing under increased pressure, making diving unsafe.Medical problems It is important to note that stressors of exercise, pressure, cold and emotional stress are all present during a dive and increase the possibility of cardiovascular disease manifesting itself – with heart disease being the main cause of death in divers.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.Before a dive (including the night before), it’s best not to drink heavily, use recreational drugs, or even gorge on heavy, greasy foods. Diving is a pretty athletic activity, so we want to make sure we’re not sick to our stomach or lagging in our cognitive abilities while on the boat and underwater.
What is the 120 rule in scuba diving?
The 120 Rule is a quick mental math tool recreational divers use, mainly for planning repeat dives in a single day within moderate depths. Its core is simple arithmetic: for any single planned dive, your maximum depth in feet plus your planned maximum bottom time in minutes should ideally equal 120 or less. How deep can you dive without decompression? Practically speaking, you can make no stop dives to 130 feet. While you can, in theory, go deeper than that and stay within no stop limits, the no stop times are so short that well within limits is essentially impossible.For recreational divers, entry level certifications train them to about 18m/ 60ft. After additional training, the maximum recommended depth is 40 meters, or about 130 feet, according to most training agencies. Beyond this, risks like nitrogen narcosis and decompression sickness increase dramatically.