If sidemount will not be used during your cave diver training, then you should take our CDS Basics Orientation program.
Technical diving is growing in popularity and it didn't take long until it grabbed our attention here at Girls that Scuba HQ! But we had a lot of questions first and a few nerves so we headed to the woman in the know - one of the only female tech instructors in Asia - Theresia Gollner - who is working at Blue Marlin in Gili T, Lombok. She gave us an intro course to twin sets and let us into the wonderful world of technical diving. Here's what she taught us:
The sidemount rig was originally invented for cave diving as it allows the diver to pass thru cracks and restrictions (tiny holes) easier than the classic back mount rig.
Skills (generally speaking) - The introductory technical diver will practice their trimming and buoyancy using new equipment. This builds the foundation for efficient diving. Once the foundation is in place, students can start to practice locomotion and then move on with more advanced skills.
Rebreathers offer an extension of diving abilities by forgoing large cylinders in favor of recycling the gas exhaled by the diver, scrubbing the CO2 exhaled, and injecting prescriptive amounts of gas from smaller cylinders. This can drastically increase the dive time compared to carrying double cylinders of the same generate size/weight, especially for deeper dives. Rebreathers can be back or sidemounted, and the profile they create is dependent on the configuration.
PADI Training app for Android(tm), Apple (r) iOS devices. Three models should be used with the most recent OS (operating-system) to ensure an excellent experience.
Despite the gear choice the entry level tech diver will be taught to streamline their equipment to prevent dangling items and drag. This ensures a maximized profile for efficient propulsion and awareness.
Gear - While all gear is identical, divers in their introductory tech classes (Intro To Tech, Sidemount and CCR Air diluent), will notice some fundamental differences in their configurations. Instead of being split into 2 stages on a single cylinder, the second stages are divided up between two with a separate stage on each. Gas planning becomes more complex and the harnesses are more chrome.
Technical diving can still be fun but is not recommended for anyone who wants to go deeper. Cave and decompression diving are more dangerous. You can reduce this risk by training and planning well in advance. Divers who do these dives are expected to be of a higher standard. Technical diving requires practice. You can't learn enough by reading and researching. Divers will find that the minimum standards for diving are often exceeded during training and technical instructors may do this. Technical training teaches divers redundancy. Problems can be solved from 1500ft within a cave. Then, an exit to the surface is possible. This is a crucial aspect of diving in this environment. It sounds complicated and scary. Technical training is both challenging and fun. It also gives divers the opportunity to explore parts of the globe that are not accessible to them.
Sidemount PCB has the expertise to answer any questions you or your doctor may have about your medical fitness to dive.
There is a wide variety of equipment that is used by technical divers the biggest impact on the decision is the environment a diver is exposed to. Many cave divers prefer to use Sidemount which means, independent single tanks are mount to the side of the divers’ body and attached by clips on a D-Ring on the waist band on the harness and on the shoulder. This allows the diver to detach and don tanks to fit thru tiny restrictions and have a lower overall profile to go to places unreachable for divers who chose backmount. During multiple trips, additional tanks can be placed in a cave or a wreck to allow the diver deeper penetration dives and to pick up tanks when leaving the cave or wreck.
Dive sidemount has become a popular sport in open waters. While it looks more sleek than having a tank strapped to your back, it doesn't hurt your back.
Sidemount regulators are also covered. You'll usually find one regulator on long hoses and one on shorter hoses with a necklace. Sidemount regs can be marked to distinguish the tank from which you are inhaling, unlike regular regs. This was a swivel-joint that I used to control my short hose regulator during my training. Additionally, you will receive two SPGs for each stage.
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.
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.
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.
Technical diving (also known as tec diving or tech diving) is non-professional scuba diving that exceeds the agency-specified limits of recreational diving.