Tec divers should have a common goal:
The challenge and adventure of exploring places that no one else has ever seen before.
Technical scuba diving involves going beyond recreational scuba diving limits and includes one or more of the following:
Diving beyond 40 metres
Required stage decompression
Diving in an overhead environment beyond 40 linear metres of the surface
Accelerated decompression and/or the use of variable gas mixtures during the dive
Use of extensive equipment and technologies.
In technical diving the surface is often inaccessible in an emergency, so tec divers use extensive procedures, equipment and training to manage the added risks and potential hazards. Although founded on extensive open-circuit scuba technology, tec diving has been revolutionized by the development, availability and reliability of closed circuit rebreathers (CCRs). CCRs have numerous benefits and provide tec divers with significantly more time underwater.
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