One of the big risks for a technical diver is decompression sickness. It occurs when nitrogen gas cannot exit the body thru respiration on ascent as the ambient pressure decreases. Therefore stops have to be executed on ascent in order to avoid a pressure difference too big so nitrogen bubbles can be formed. Buoyancy control is very important to control the stops on ascent and increase efficiency for off-gassing of nitrogen. Another important skill is proper breathing which makes metabolism efficient. Trim, which we call a proper tech diving position such as horizontal with a slight arch in the back, looking forward and knees at a 90 degree angle with fins pointing back. Trim prevents stirring up sediments on the bottom as well as most efficient movement in the water. And of course proper finning techniques to avoid overexertion are mandatory to make a diver achieve maximum performance. Now you might say, we want to have fun when we go diving and not be a machine.
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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.
You can learn the SSI technical diver course and dive with up to four tanks (cylinders), for extended dives. The technical sidemount diver class is a great way for you to start technical diving. You will learn how to manage multiple cylinders during one dive. Also, learn how to configure your sidemount gear and set up a tec harness.
Since the beginning of the century, one of the most significant changes in the equipment cave divers use has been the shift from backmounted doubles to sidemount. Not only do a substantial number of cave divers now sidemount, it’s possible that there are more open-circuit sidemount cave divers than backmount cave divers.
2 first-stage regulator, 2 2nd-stage regulator, an exposure suit with side pockets and a BCD sidemount. A diving spool, mask and a spare mask. Technical diving equipments. 1 long, 2.10m to 7.10ft hose.
If you plan to go sidemount, particularly if you are a tec diver already, you will need to learn about your new rig. How to adjust it, how it can be used to enter the water, and more.
Computer-aided instruction is an integral part of nearly every course we teach. The Why? is simple: eLearning helps get our students in the water sooner and spend more time there. It’s why we include the cost of any applicable eLearning programs — usually a $140 value — in our courses at no extra charge. This translates directly into an extra day of in-water training. The value of that? Priceless.
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.
‘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.
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Overhead diving professionals are allowed to use cave passages that were formed by millions of years worth of water erosion. They can be found thousands of feet away from the entrance. These sites are a treasure trove of beauty and tranquility, which was only possible because of the time it took to form them.
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Gear - While the gear remains the same, divers taking an introductory tech class, such as Sidemount, Intro to Tech or CCR air diluent, will notice some configuration differences. Instead of two second stages on one cylindrical, they're divided between two with a separate initial stage for each. The gas planning becomes a more in-depth process, and the harnesses appear to have more chrome.
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.
Have a PADI Deep Specialty Instructor certification or have completed a PADI Deep Specialty Instructor course. Have at least 100 logged dives, including at least 20 enriched air dives, 25 dives deeper than 18 meters/60 feet, and 15 dives deeper than 30 meters/100 feet. You can become a Tec 45 diver.
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.