Cave passages that have been formed through millions of years of erosion are only available to those who are certified in overhead diving. They stretch thousands upon thousands of feet. The incredible time span in which these caves were created is a testament to their unique beauty and tranquility.
2nd stage regulator and exposure suit with side pocket, BCD sidemount. SMB. Cutting tool. 2nd stage regulator. 2nd stage regulator. 2nd stage regulator. 2nd stage regulator. 2nd stage regulator. 2nd stage regulator. 2nd stage regulation. 2nd stage regulator. 2nd stage regulator. 2nd stage regulator. 2nd stage regulator. 2nd stage regulator. 2nd stage regulatory. 2nd stage regulator. 2nd Stage regulator. 2nd stage regulator. 2nd stage regulator. 2nd stage regulator. 2nd hose
The next day was technical sidemount. This means that we added our deco 50 and 100 percent oxygen tanks on either side. This can increase your profile underwater. It is important that you keep your tanks as small as possible. The clips can be found on each side. As your tanks become buoyant, you will adjust your tank position to fit the second clip. Here, the goal is to be as efficient as possible. Each few minutes, you switch your breathing between the tanks. By doing this, the pressure in each of the tanks will decrease at roughly the exact same rate. In the event that a tank or regulator fails you will still be able to breathe. It is important to gain experience with any new thing. I spent the next few nights doing deco dives with the sidemount rig. I was buddied with Evolution coowner David Joyce who is a very experienced Tec diver as well as a Trimix instructor. One dive saw us visit the Japanese Mogami Japanese Mogami sank at 164 feet. It was here that I was seduced by old gas masks and uniforms as well as a few bones.
TDI 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.
Television, magazines and stories from friends - no matter what source, the idea of exploring the underwater world is captivating and thrilling. What can we do to keep exploring the underwater world? What is technical diving exactly?
There are three parts of certification: knowledge, skill practice, and open water diving. You can either complete them all locally, while on holiday, or divide them.
International Training, the parent organization for Scuba Diving International (SDI) and Technical Diving International (TDI) offers both SDI and TDI versions of their Sidemount Diver course. Both courses are very similar. Both use the same learning materials (which, by the way, we wrote). So what’s the difference?
You should not use sidemount in your cave diver training. Our CDS Basics Orientation class is what you need.
In general Sidemount is more task loading for a diver as the pressure in each tank needs to be balanced in order to have enough gas for an out of air diver and to be balanced on each side.
I will admit my Sidemount Diver course was probably one of the most challenging courses I have ever done. Mind you, this was mainly because my trusted dive center in Koh Tao, Big Blue Tech, and my instructor Fiona included a lot more skills and dives as part of my course than required. While always making sure that my task load was manageable we practiced skills over and over again and included things like mask removable, tank removable underwater, SMB deployment, out of air drills, and many more all while staying (or at least trying to) in perfect trim.
On top of this specialized Sidemount equipment, you will also need your usual wetsuit, fins, mask, computer, compass, and DSMB.
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.
Skills (general): The introductory tech diver will practice the use of new equipment to trim and control buoyancy. This helps to build the foundation for efficient diving. Once you have a solid foundation, you can start practicing locomotion or move on to more advanced skills.
Technical divers can explore wrecks and reefs down to depths of 40 meters/130 feet. They can dive in underwater caves or other areas that are not accessible to recreational divers.
To register for the PADI Advanced Rebreather Diver course, you must first: You must be a PADI Open Water Diver, but you must also be a PADI Advanced Open Water Diver to become a PADI Advanced Rebreather Diver. Have at least 30 dives under your belt.
The depth range of oxygen rebreathers (simple closed circuit) is limited to approximately 6 m, beyond which the risk of acute oxygen toxicity rises to unacceptable levels very quickly.
from 170 to 350 feet
While conventional scuba diving has a recommended maximum depth of 130 feet, technical divers may work at depths ranging from 170 feet to 350 feet, and sometimes even deeper.