- January 20, 2013 11:16 pm
If you are thinking about learning how to dive, then you will need to know about the scuba equipment used for the type of diving you want to do. As a general rule, always stick to general diving conditions that match your skill level and knowledge of how and where to dive. But not to worry because taking a certified diving course will teach you all about the basic diving gear.
Similar to school, the diving instructor must give you a basic competency test that you need to pass. If you need help understanding any of the concepts presented, you will have a lot of time get things straight. The diving that you do will require you to pick up a few gadgets and some equipment for your scuba diving.
Open circuit scuba diving usually involves the diver wearing one gas, or air, cylinder and all the associated components and devices. One will discover that open circuit diving is not as long as when you are diving with a closed circuit set-up or rebreather configuration. A blend of 21% oxygen and 79% nitrogen is the basic air blend for many if not all divers who dive for recreation. Years ago divers that were attired with dual cylinder backpacks were at a higher percentage rate. All the same, you don’t see it as much today as the single cylinder structure. A diving type known as technical diving is where one discovers more twin pack wearing divers. There is an old-style design that is called the twin-hose configuration, and that was the very first design for a demand valve to achieve widespread use. As you can ascertain by the name “twin-hose”, this system uses two cylinders and hoses, but it didn’t start out that way. When Cousteau first designed the system it only had one hose, but when he tried it out in the River Marne there was a problem and it was necessary to add the second tube. An A-Clamp was generally used to attach the large, circular valve assembly to the top of the twin cylinders. The purpose of the second tube was exhalation and this helped to maintain the pressure in the breathing hose at the same pressure as the water outside the regulator. There were special design considerations that were critical for safe operations. As an example, in order to prohibit the flow of gas with no restriction, the second (inhalation) tube had to be placed close to the other equipment.
You will always know if you are with a technical diver as they will go deeper than you would imagine going yourself. Diving in waters that are extremely deep require special skills, acquirements, and an awareness that only veterans typically have. These deep sea divers will be using special mixtures of gas, and they will carry redundant gas systems along with them for emergency back-up. It is commonplace to see pony cylinders attached to divers that do this type of diving. These are actually a completely separate unit having separate mouthpieces, demand regulators, and hoses on each unit. They are completely separate from the main scuba set and exist in case of a malfunction or if they should exhaust their primary gas supplies. Make sure to take into consideration the environment in which you will be diving when you select your scuba diving gear. But either way, be very sure you have a firm understanding of how the individual devices and components work. Not only must you understand how each piece of equipment operates, and what it’s for, you have to know what it will do when you are underwater on a dive.