What is the 120 rule in diving?
The rule advises that the dive depth (in feet) in addition to the time a diver spends underwater (in minutes) should add up to no more than 120. The purpose of this rule is to help scuba divers to avoid serious dangers such as nitrogen narcosis as well as decompression sickness by keeping them within a safe range. Because excess nitrogen remains dissolved in the body tissues for at least 12 hours after each dive, repeated dives within 1 day are more likely to cause decompression sickness than a single dive.For example a SCUBA diver can go down about 165 feet (with proper training), the Alvin (a deep sea submersible) can take 3 people down to 13,000 feet (2. ROVs (stands for Remote Operated Vehicle, no people inside, it is remotely operated by people on land) can go down the deepest to about 35,000 feet, that .The rule advises that the dive depth (in feet) in addition to the time a diver spends underwater (in minutes) should add up to no more than 120. The purpose of this rule is to help scuba divers to avoid serious dangers such as nitrogen narcosis as well as decompression sickness by keeping them within a safe range.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).
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. Oxygen Toxicity During Diving If a person breathes 100% oxygen, this partial pressure would be reached at a depth of 13 feet (4 meters). Because air consists of only 21% oxygen, to reach that toxic partial pressure breathing air would require a dive to slightly over 187 feet (57 meters) in depth.It’s rare, but the bends can occur at 10–20 feet (3. The bends generally aren’t a concern unless you go deeper than 30 feet (9.Deep diving is defined as a dive that exceeds 60 feet (18. That means that most people can dive up to a maximum of 60 feet safely. For most swimmers, a depth of 20 feet (6.Some recreational divers have descended to depths of 1,000 feet and beyond and survived the experience without any problems. However, the biggest concern is getting crushed from the increasing weight of the water. The water pressure can suffocate you to death if you don’t take precautions.Most divers recover fully from the bends with proper treatment. To start with, breathing 100 percent oxygen can reduce symptoms and assist with nitrogen elimination. However, even if symptoms disappear, they can come back later.