‘Shadow Divers’ by Robert Kurson is about the identification of a German submarine that was tried to be identified by John Chatterton and his crew during almost a decade.
I 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.
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!
The technical sidemount was completed the next day. This involved adding our 50-percent oxygen tank and 100 percent oxygen tanks to either side. This will increase your profile underwater. You must ensure that the tanks are as slim as possible. A couple of clips are located on either side of your waist. When your tanks become positively buoyant and you inhale, adjust the clip to match your tank position. It is important to keep your breathing as smooth as possible. Your breathing will change from one tank to another every few minutes. The pressure in each tank will drop at approximately the same rate. If a regulator or tank fails, you will still have gas to breath. Comfort and enjoyment can only be achieved by gaining experience. I spent the next few day doing deco dives using the sidemount rig with Evolution co-owner David Joyce, a Trimix instructor and Tec diver. We visited the Japanese Mogami wreck at 164ft, where I was charmed by the pieces of old gas masks and uniforms.
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:
You are interested in becoming Sidemount Diver? This article will provide all the information you need about what it takes to become a Sidemount diver.
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
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.
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.
I arrived just two months ago on Malapascua Island in Philippines. There, I will learn how to become a Tec diver instructor. Since 2012, I've been a Bali recreational instructor. I am eager to improve my diving skills and expand my knowledge. Sidemount PCB was the place where my first experience of technical diving was. Tom West, PADI course director and instructor-trainer for Tec, made me a Certified Tec-50 Diver.
Know what you’re getting: Prices include instruction and eLearning fees. Bear in mind, the cost of eLearning, by itself, can be worth anywhere from $140 to $280 or more. Thus, a $640 course from us may actually cost the same as a $500 course from someone else if you have to pay for elearning separately.
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.
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).
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.
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.