To dive, you must have a minimum of fitness and good health. Before diving, you may need to be cleared by a doctor if your health is not in good condition.
The sidemount rig was initially created for cave diving. This allows the diver through small cracks (tiny holes) more quickly than the back mount rig.
These cards are only issued to those who have earned them. Participating in a course is not a guarantee of certification. Certification cards may be offered by multiple agencies for cave courses. C-cards cost $30 to $30 per card, depending on the agency. Ask your instructor for more information.
Divers who are comfortable with sidemount diving can also enjoy open-water dives. Why? Because sidemount diving is very easy and comfortable.
If you are not ready to dive locally, but wish to support your local dive center, you can complete eLearning courses and coursework close to home. You can then travel to complete your training dives. Ask your local PADI Dive Center for a referral.
There are three parts to certification. Knowledge development, skill practice and open-water diving. You can do all three on your own, or take a break to complete one of them.
Being a technical diver requires a lot of training, experience, and passion. The added risks of technical diving are not worth the risk if any one of these is missing.
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.
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.
Sidemount Diver was one of my most challenging courses. This was due to the fact that my instructor Fiona, from Big Blue Tech, a trusted dive center in Koh Takao, included more skills and dives than I needed. My task load was always manageable so we practiced skills repeatedly. This included mask removable, tank removable underwater, out of air drills, and SMB deployment. We also kept our trim.
However it is important at greater depths to decrease effort and achieve maximum performance to avoid overexertion and CO2 buildup. CO2 is the trigger for our breathing reflex, so the more CO2 we build up the more we will feel the urge to breathe. This means in the same amount of time we will pump more gas through our lungs and we take in more gas in the same amount of time.
At first, technical diving was not something that interested me. I can clearly recall chuckling to my self at the Tec divers I observed, and wondering why anyone would want to have more equipment under water. I love the feeling of freedom and closeness to nature that can envelope you in "the quiet world". Tom was a respected teacher who I felt it was important to share my experience in Tec courses with.
A minimum of fitness is required for scuba diving. A physician may be required to approve you before diving if you have any chronic conditions, are taking certain medications, or have had recent surgery.
Technical diving was something I didn't initially like to do. I clearly remember chuckling at the Tec divers that I saw and wondering why anyone would want more equipment underwater. The feeling of being close to nature and the freedom it can give you is something I love. Tom was an inspiring teacher and it seemed right to try, as I was working at a dive shop that offered Tec courses.
Technical diving (also known as tec diving or tech diving) is non-professional scuba diving that exceeds the agency-specified limits of recreational diving.
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.
To begin a technical diving course, you must have completed the following prerequisites: a PADI Advanced Open Water Diver certificate or equivalent, a PADI Enriched Air Diver certificate or equivalent, and a PADI Deep Diver certificate or proof of at least 10 dives to 30 metres/100 feet.