Sidemount Diver is one of the most challenging courses that I have ever completed. It was because Big Blue Tech, my trusted dive shop in Koh Tai, and Fiona my instructor included many more skills and dives to my course than necessary. Although we made sure my task load was manageable, we still practiced skills. These included tank removal underwater, mask removable, out-of air drills, SMB deployment, and many other things while maintaining (or trying to maintain) perfect trim.
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:
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Are you interested in becoming a Sidemount diver. This post will explain everything you need to know about becoming a Sidemount diver.
Technical diving means that a diver is not allowed to reach the surface from any point during the dive. It could be due to a ceiling in the form of a cave/wreck or virtual ceilings created by decompression obligations. To avoid decompression sickness, you must perform mandatory stops on ascent when the NDL's are exceeded. This usually requires the use special equipment like Sidemounts and Twinsets. Twinsets and Sidemounts require special gas mixes, additional training, and twinsets/sidemounts to ensure that you can perform these stops correctly on ascent in order to maximize Nitrogen offgassing.
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.
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.
Sidemount Diver Specialty dives may count toward Advanced Open Water Diver certification. Ask an instructor.
Technical diving can be defined as being exposed to a ceiling that prevents a diver from ascending to the surface during a dive. This could be caused by a ceiling (in terms of a cave, a wreck, etc.) or a virtual ceiling that is created by a decompression duty. To avoid decompression sickness, it is necessary to perform mandatory decompression stops on ascent if you exceed the NDL. This requires special equipment such as a Twinset or Sidemount. Special equipment such as Twinsets and Sidemounts, gas mixtures with special properties, and additional training are required to be able perform the stops on ascent accurately to maximize Nitrogen off-gassing.
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.
The goal of this course is to teach you the basics of how to use the equipment in your cave or tech diver training. You will also need the same equipment for the course. This includes:
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.
Technical diving (also known as tec diving or tech diving) is non-professional scuba diving that exceeds the agency-specified limits of recreational diving.