Thailand – Australia – United Kingdom

Valentines Tech Expedition: Decompression Procedures Diver

Divers advance to the level of conducting decompression dives

Koh Tao, Thailand – Big Blue Tech celebrates the graduation of Yvonne Fries, Helen Artal, Thomas Hallstrom and Duncan Tyler from a TDI Decompression Procedures course conducted by TDI Instructor James Thornton-Allan and assisted by Andrew Cavell and Ash Dunn over various dive sites on Koh Tao Island in Thailand.

The TDI Decompression Procedures course is designed to train a diver who has training in technical diving in the methods and skills involved with decompression diving. Recreational diving is considered no stop which means you can leave your depth and ascend to the surface at anytime (optional safety stop recommended), with decompression diving the diver has absorbed into their tissues (muscles and blood) a lot of gas which is forced in during deep and long duration diving of compressed air. Because the tissues are saturated with nitrogen it’s mandatory that decompression divers stop at certain depths for certain periods of time to let the nitrogen bubble leave the body safely. Failing to do this safely can cause the bubble to expand to fast causing decompression sickness or “the bends”. To those unfamiliar with diving, our atmosphere is made up of a concentration of 21% oxygen and 79% nitrogen, divers use this air in our tanks after a filtration system, it’s the concentration of nitrogen which effects the divers at this level.

The skills the divers had to learn were varied from following a complex schedule itemizing their stops and time, buoyancy skills like oral inflation of their wing at depth to deployment of back-up mask. Other skills continued throughout the 4 dives of this course which lead the divers to receive the coveted certification which is the most recognized internationally as a entry level technical diver.

The students were issued certification after and exam and progress on to their TDI Extended Range course tomorrow with a trip to the similan islands and khao sok national park. You can read more about the Decompession Procedures course here: TDI Decompression Procedures Diver Course


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