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. 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 120 rule in scuba 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. Total time = Tank capacity / Air per minute. Using an 80 cubic foot tank at 3,000 psi: A diver with a SAC rate of 0. With an 80 cubic foot tank, they’d have about 53 minutes of dive time (80 / 1.According to the US Navy dive decompression tables a diver may spend up to five minutes at 160′ (47 meters) without needing to decompress during their ascent. The longer a diver stays underwater the greater their exposure to “the bends” becomes.
What is the golden rule in scuba diving?
The Rules of Scuba Diving: Never Hold Your Breath. Plan Your Dive. Dive Within Your Limits. Ascend Slowly (and Don’t Forget Your Safety Stop) However, technical divers, who undergo additional training and use specialized equipment, can explore depths beyond recreational limits, typically reaching depths of 60 meters (200 feet) or more.Technical diving is a more complex, and challenging, form of scuba diving. Technical divers rely on specialized training, equipment, and mixed gases to safely descend beyond the recreational limit to depths that can exceed 90 meters (300 feet).On the deepest working dives, at depths greater than 600 m, ambient pressure is greater than 6100 kPa and the divers breathe gas mixtures containing about 2% oxygen to avoid acute oxygen toxicity.
What is the golden rule of scuba 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. A person with heart trouble, a current cold or congestion or who has epilepsy, asthma, a serious medical problem, or who is under the influence of alcohol or drugs, should not dive.
What is the best breathing pattern for scuba diving?
The only thing for certain is that the optimum breathing strategy when scuba diving is deep slow breathing. You need to inhale slowly and then also exhale slowly without holding your breath. The first rule of scuba diving is to breathe continuously and never hold your breath.