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Backmounted doubles were created in response to problems with single orifice and backmounted independences. Independents consist of two cylinders, each with its own regulator. The diver could only use one cylinder if a first stage failed. Single orifice duals consisted of two cylinders linked by a valve. One regulator was used for the first stage. The gas would not be released if the first stage failed due to a failure of one orifice doubles. Both of these problems have been eliminated by today's isolated manifold duplicates. Each cylinder is capable of being worked separately, but the diver can use one regulator to allow him or her to inhale gas directly from both cylinders. This type of doubles is usually held together using metal bands. Additionally, the valves are linked by an isolation manifold which allows the two to be separated as needed. Backmounted doubles diving looks similar to regular single cylinder backmounts, but it has a profile that is vertically identical.
Skills (general) – The introductory tech diver will practice their trim and buoyancy with the new equipment configuration. This builds the foundation of efficient diving. Once the foundation is there the student can practice locomotion and move on to more advanced skill practice.
Sidemount rigs were initially designed for cave diving. It allows divers to pass through small cracks and restrictions (tiny hole) much more easily than the traditional back mount rig.
‘Caverns Measureless to Men’ by Sheck Exley, one of the pioneers of cave diving in Florida, USA. He also wore ‘Basic Cave Diving: A Blueprint for Survival’ which studies many cave diving accidents.
To make dives beyond 130ft, decompression divers will add Helium to the cylinders. Then they can explore the realm of the uncommon. Their experiences at wrecks and reefs are often less frequent than those of astronauts who visit the moon.
Side Mount Scuba ConfigurationI was a bit numb after my initial pool sessions. I was strapped into the twin tanks, trying to conduct valve drills. But, the Tec 40-45 and 50 courses helped me to feel more comfortable and my skills began to improve. By the end of the course, I was enjoying myself. It's about taking your diving skills, buoyancy and awareness up to the next level. This is what Tec diving offers. This is a great feeling. Knowing you're capable in managing life-threatening emergency situations at depth without the need to ascend to the surface (dues decompression requirements), is an amazing feeling. It's very satisfying to execute your dive program with military precision.
Technical diving is fun, but not for those who want to dive deeper. Cave and decompression diving carry a greater risk. Dive planning and training are key to reducing this risk. These divers are held to a higher standard. To become a skilled diver, it will take practice. It is not possible to replace the time spent in water, no matter how much research you do. Divers will see that minimum standards are often exceeded by instructors during training courses. Technical training teaches diver redundancy. This allows problems to be solved at 1500ft in a cave, and then an exit can be made to the surface. Although it sounds scary and complicated, this is an essential aspect of diving in such an environment. Technical training is challenging, but also fun. The diver will have a golden ticket that opens up new areas of the world.
Technical diving is great fun, but it isn't recommended for anyone looking to dive deeper. Cave and deep diving pose a higher risk. It is possible to mitigate this risk through careful dive planning and training. Divemasters performing these dives will be held to a high standard. It will take practice and hard work to become a technical diver. The only way to improve your water time is through research and reading. Divers will often notice that the minimum standards of diving are often exceeded in training courses. Technical instructors can often exceed these minimum standards. Technical training helps to teach diver redundancy. While it may sound scary and difficult, it is necessary to dive in such an environment. Technical training is fun, challenging and gives you the chance to see places in the world that are closed to others.
International Training, which is the parent organization for Technical Diving International / Scuba Diving International, offers both the SDI version and TDI versions their Sidemount Diver course. Both courses can be used in the same way. Both courses use the exact same learning materials (which, obviously, we wrote). What's the difference then?
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Our CDS Basics Orientation course is the best option if you don't plan to use sidemount while you cave diver training.
Your Sidemount BCD harness is made up of a bladder, sliding D-rings and bungee cords. Your tank position and trim will depend on their fit. Your instructor may spend a lot of time getting them right.
You will also learn how to use Sidemount regulators. Usually, you will have one regulator on a long hose as well as one regulator on a short hose with a necklace. Unlike your normal regs, Sidemount regs are also marked so you can easily distinguish which tank you are breathing from. During my training, this included a swivel joint for my short hose regulator. In addition, you will have 2 SPGs – one for each first stage.
2-3 hours
Even with small cylinders, you can usually dive for 2-3 hours (rebreathers typically have two 2/3l cylinders or one 3/5l cylinder).
Have a PADI Deep Specialty Instructor certification or have completed a PADI Deep Specialty Instructor course. Have at least 100 logged dives, including at least 20 enriched air dives, 25 dives deeper than 18 meters/60 feet, and 15 dives deeper than 30 meters/100 feet. You can become a Tec 45 diver.
According to experts, approximately 40% of technical divers enroll in additional education and training programs. This yields a reasonable estimate of approximately 160,000 active technical divers worldwide.