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Technical Foundations divers will be trained to utilize singles with H-valves or twinsets, and stage cylinders or pony bottles. They will be introduced to advanced dive planning and make training dives as deep as 42m (140 ft). Students will also learn oxygen procedures and may use up to EAN50 for contingency decompression and to improve off-gas efficiency at safety stops.

Prerequisits: minimum 18 years old, minimum 50 logged dives, certification in Deep, Stress & Rescue, Enriched Air Nitrox and additionally certification in Navigation or Cavern, Advanced Open Water Diver