If you're a Tec diver and want to do sidemount diving, it's important to know how to set up your new rig, adjust it, enter the water with it, and much more.
Our CDS Basics Orientation course is the best option if you don't plan to use sidemount while you cave diver training.
Initial pool sessions were hard. I felt like an openwater diver again, strapped in to the twin tanks trying to conduct valve drills. However, as we moved through the Tec 40 to 45 and 50 courses, our skills improved and we were able to enjoy the course. The most satisfying part of Tec diving is taking your skills, buoyancy, knowledge and awareness to the next stage. It is quite exciting to be able to manage life-threatening emergencies at deep water without having to climb to the surface (due decompression requirements). It's gratifying to execute your dive plan in military precision.
With most agencies you can choose between recreational Sidemount and technical Sidemount. The prerequisites for example with SDI and TDI are the same but the tec Sidemount course will add more skills. It will also ask more of you in terms of mastering them – perfect trim and keeping still and leveled during your skills is a must!
There are several more agencies that provide technical diver training which are more region specific. In general the recommendation is to find a reputable instructor, look for recommendations from trusted sources and choose your instructor accordingly. Trust and comfort during the course are invaluable and will help you to feel confident and comfortable to push your boundaries and gain the knowledge you need to go beyond your current certification level.
Sidemount diving is easy with an Open Water Diver. You will need to be able to handle your equipment yourself. Sidemount diving adds a new dimension in terms of equipment setup and skill.
Sidemount diving provides an independent air source. Two tanks are used, each with their own regulators and first stage, SPG. This makes it much safer and gives little air-hogs (like me) a lot more oxygen. Sidemount's tanks can be easily accessed from the surface. There is no pressure on the back.
The entry-level tech diver will be trained to optimize their equipment to reduce drag and avoid dangling gear. This will ensure a maximum profile for efficient propulsion, awareness and propulsion.
Sidemount is not something you'll be doing during cave diving training. Instead, you should look at our CDS Basics Orientation Course.
Whatever configuration a diver chooses there is benefits for each and in different situations each configuration has its up or downside.
Don't wait! Find a TDI instructor near you today: https://www.tdisdi.com/search/?area=instructors
Because single orifice duals and backmounted independencies are less common today, backmounted doubles became popular. Independents have two cylinders strapped to the back of one another with independent regulators. If the 1st stage failed, the diver would only need one cylinder. Single orifice twos were two cylinders that were connected with a regulator and a valve. A failure on the first stage would result in gas loss. Both problems are solved by the isolation manifold doubles that are used today. Each cylinder may be used independently. But, divers can also use the same regulator to breathe gas from both. These doubles are often held together by metal bands. If necessary, the valves can be connected to an isolation manifold. Backmounted doubles diving has a similar profile to regular single-cylinder dives. However, the profile is vertically identical.
Depending on the environment and type of diving each configuration has its advantage and disadvantage. Diving in caves or wrecks the preferred way to dive for sure is either Sidemount or rebreathers. There is also an option for a Sidemount rebreather which makes the diver more streamlined to fit through narrow restrictions. Sidemount also gives the diver the advantage to leave tanks behind that will be picked up upon exiting the cave or wreck. To fit through narrow bedding planes unclipping the tanks makes the profile of the diver even smaller and places that are not available to a backmounted twinset diver become accessible.
SDI/TDIIncludes Two Open Water DivingsMinimum Age 18 Years, Minimum 15 Years with Parental Consent.
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.
5-6 days
Rebreather training classes are typically 5-6 days long, but can be longer depending on a variety of factors such as the training agency, your local conditions, your instructor, and your ability to meet the class standards.
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).