About Technical Diving
The term “Technical Diving” is an activity in which a diver, after undergoing special training and after using special equipment and means to dive, uses other mixtures of gases outside the air. Dives deeper than 40 meters. He dives in an environment where the ascent cannot be made directly to the surface, eg in a cave or in a shipwreck, and his dives require mandatory decompression stops. Technical Diving must go through special training.
The definition of Technical Diving also includes special forms of diving such as cave diving, shipwreck diving, use of closed or semi-closed devices (Rebreathers). When it comes to respirators or Rebreathers, this is not a new product or a new technology. In contrast, Rebreather (R) has to show a long history over time. For Amateur & Technical Diving divers using Rebreather, these represent an extremely useful “tool”.
About Rebreathers
Semiclosed Circuit Rebreather
Closed Circuit Rebreather
Rebreathers are devices that are divided into two main categories:
a. The first category consists of closed circuit devices (CCR). CCTV devices use only oxygen and are purely mechanical or use a system to mix oxygen with the contents of a second gas cylinder to provide optimal gas to the breathing circuit for each depth.
b. The second category consists of semi-closed devices (SCR) which use a mixture of gases or mix oxygen themselves with a separate mixture of gases.
But all of the above devices have some things in common. In all these devices we find the respiratory circuit and a mouthpiece from which we breathe. The respiratory circuit also includes a space made of soft material, which swells when we exhale and deflates when we inhale.
To remove the carbon dioxide produced as we metabolize the oxygen we inhale, a container containing a chemical scrubber is inserted into the respiratory circuit. Carbon dioxide is captured in the container. The system is one-way (with the exception of one type of closed-circuit oxygen devices that do not use valves and the gas circulation is two-way). Most devices include a valve or system that allows the user to close the breathing circuit if they want to remove the mouthpiece while underwater. The main differences between closed or semi-closed devices are the way they inject gas into the respiratory circuit and control the concentration of oxygen in the inhalable gas.
PADI Technical Diving Courses
