Sidemount cylinder mounting originated for cave diving and have become more popular in all forms of technical diving since. They separate the dual cylinders, with a 1st stage on each cylinder, and mount them on either side of the diver’s body. This doesn’t allow the diver to breathe from either cylinder in the event of a regulator failure, but does give the diver easier access to valves. Sidemount diving gives the diver a larger horizontal profile, but a smaller vertical profile.
Additionally, sidemount diving has become wildly popular even for open water diving. Why? It is because sidemount diving can be very relaxing and simple to learn.
When or why I decided to do my Sidemount course I don’t remember. As with most of my diving decisions, it was probably a case of – oh that looks cool, could be useful, I’m going to try it!I knew that Sidemount was going to be a useful certification and something that I could use in the future and build on. I also knew that I eventually wanted to do some proper cave diving and that a Sidemount certification would come in handy for that.
If sidemount will not be used during your cave diver training, then you should take our CDS Basics Orientation program.
Twinsets on the other hand are two tanks attached to the back of the diver and are usually connected with each other thru a manifold. This means a diver can access to both tanks using a single regulator.
For dives deeper than 56m gas mixes called Trimix are used. In order to reduce narcosis and reduce the toxic effects of Nitrogen and Oxygen, Helium is added which has no negative effect on our body to very deep depth. There are additional risks with helium but those start at depths of around 180m. In history tests have been executed with different noble gasses, however they all turned out to be toxic for the human body, so helium was the only one adequate for diving. One other gas that has no effect on the human body is Hydrogen but due to its high risk of fire and explosion in contact with oxygen, the blending of it is very difficult if not almost impossible with the techniques we use currently.
How To Become A Sidemount Technical Scuba Diver GirlTDI is an American tech diving organization that was found in 1994 and has instructors all around the world. The prerequisite to start technical diving with a TDI instructor are the Advanced Open Water certification of any organization, Nitrox certified and a minimum of 25 dives. The first technical diving courses are TDI Sidemount (within No deco limits) and Advanced Nitrox and Decompression Procedures allowing to dive to 45m, using oxygen mixes up to 100% of oxygen and doing staged decompression stops. The course contents include theory, pool work, and a minimum of 6 dives depending on your level of comfort in the water in order to be able to complete all open water requirements safely and efficiently and to understand planning and preparation of a technical dive.
While we are able to teach the SDI course if you ask, the default is the TDI. Although you can do this program as an individual course, we recommend that students combine it with our Apprentice Cave Diver course.
If you don't want to dive locally but still wish to support your local dive shop you can complete eLearning coursework and training in your home country. To request a referral to your local PADI Dive Center, please contact us.
So what are you waiting? Find a TDI instructor near you today: https://www.tdisdi.com/search/?area=instructors
Cave passages formed over millions years of water erosion and extending thousands of feet from their entrance are reserved only for overhead divers. They are stunning in their beauty and peacefulness, but only because they were formed so long ago.
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Gear - While the gear remains the same, divers taking an introductory tech class, such as Sidemount, Intro to Tech or CCR air diluent, will notice some configuration differences. Instead of two second stages on one cylindrical, they're divided between two with a separate initial stage for each. The gas planning becomes a more in-depth process, and the harnesses appear to have more chrome.
The Sidemount Diver Specialty course dive may count toward your Advanced Open Water Diver certification – ask your instructor about earning credit.
Technical diving (also known as tec diving or tech diving) is non-professional scuba diving that exceeds the agency-specified limits of recreational diving.