Learning leisure diving from mistakes, whether it is the knowledge of equipment, the operation process of diving or many diving rules, actually comes from technical diving; In the inheritance of underwater knowledge, the most important contribution of technical diving should belong to "accidental analysis". Cave diving organizations began to analyze the causes of diving accidents more than ten years ago, and then in the spirit of learning from mistakes, they constantly strengthened their equipment or training courses to avoid similar accidents in the future. Even today, cave diving organizations and other technical diving organizations are constantly exploring the underwater world according to this model, and the model of "learning from mistakes" has been extended to all fields of technical diving.
In the field of leisure diving, the diver network
(Dan) Every year, this organization sorts out many examples of accidents caused by decompression and lack of correct diving knowledge. The organization will also analyze the causes of leisure diving accidents, draw charts and reports for all DAN members to browse for free.
Divers who control your breathing skills have long used the so-called "one-third principle" to control their air consumption. Literally, it means that you must use one-third of the air for technical diving, another one-third of the air to swim back to the water entry point, and the last one-third of the air is reserved for emergency and decompression. Not surprisingly, almost all technical diving centers now use this "one-third principle" to teach all technical divers, especially when a diver wants to dive over 60_.
Try to slow down your ascent. An unchangeable rule against decompression sickness is to slow down your ascending speed and stay at a deeper depth to decompress. Whether it is the experience of experienced technical divers or the diving schedule of computer watches, the benefits of slow rising speed and deep decompression stay can be gradually discovered. Some experienced technical divers and some well-known leisure diving centers are now strongly advocating that the rising speed should not be greater than 30_ per minute. Some diving centers with new information even revised the depth of decompression stay they taught students.
NAUI diving organization directly advises leisure divers to do a one-minute decompression stop at half the maximum diving depth. This concept was mentioned in the previous newsletter. You can go back and have a look if you are interested. And the one-minute decompression stay is slower to increase the effect of nitrogen removal. Theoretically, deep decompression stay can prevent decompression sickness, because large water pressure is not easy to make undissolved microbubbles in the body gather, and there is time for body tissues to be discharged.
Today, it is very common to use other air sources for high oxygen diving. Almost many diving centers in foreign countries have set up courses in using hyperoxia diving, which completely subverts people's SkinDiver in 1995.
The magazine's distrust of high oxygen and the impression that high oxygen is "black gas".
Replacing a certain proportion of oxygen in divers' cylinders to avoid DCS decompression sickness was very doubtful in the past, but it was constant scientific experiments and theories that gave high-oxygen diving opportunities. Through dick
Rutkowski (spokesperson for the National Association of Women and Men)
It is proved that hyperoxic diving does provide a better gas choice for divers who need more time to collect data without decompression in scientific diving.
When dick
1985 After retiring from NOAA, Rutkowski has been devoted to the training of the world's first hyperoxic training center and hyperoxic diving. Faced with the refutation of hyperoxia by the general environment at that time, including many old coaches who refused because they didn't understand hyperoxia, he devoted himself to scientific research, and then put forward a famous saying in diving, "science".
alwayswinsoverbullshit .
Nowadays, the basic certification of high-oxygen diving has been recognized as a simple leisure activity. Any diver in open water can be educated in hyperoxia course and then use mixed gas with oxygen concentration close to 40% to achieve the purpose of prolonging underwater time. Moreover, high-oxygen equipment can also be bought in major diving shops, including renting cylinders mixed with high oxygen.
Buy better equipment. Compared with recreational divers, technical divers have different requirements for equipment. The biggest difference is the buoyancy vest BC with airbags. For technical divers, the stable face-down and streamlined airbag design can cope with the narrow space in caves and cabins, so more and more technical diving BC is used in leisure diving activities.
Other equipment may be different in carrying a backup air source.
Air) or electronic surveillance, both of which must be as small as possible for technical divers to carry. Even on the standby secondary head, there is a big difference. The extended spare secondary pipe can allow technical divers to have more space for gas cylinders when passing through caves or cabins.
A piece of equipment and even leisure diving should be necessary. Many technical divers will carry more than two computer watches in one dive, so you can understand how important computer watches are to divers' safety. Even if you are engaged in leisure diving, we suggest that you take at least one computer watch with normal function when you go into the water.
Most of the decompression diving in the above sub-stations takes place in the United States or other areas with technical shallow water resources, which means that not every recreational diver can try technical diving. This activity must undergo professional training and study before it can be planned and implemented under good environmental conditions.