Safety guides
Emergency oxygen first aid
First-aid oxygen can support an injured diver while professional care is arranged.
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Safety guides
Hypoxia and inadequate oxygen
Too little oxygen can cause loss of consciousness, potentially without a useful warning.
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Oxygen toxicity explained
Oxygen is essential for life, but too much exposure under pressure can injure the body.
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Advanced Nitrox
High-oxygen decompression gases and oxygen-clean equipment — a different capability from recreational Nitrox.
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Advanced Nitrox
High-oxygen decompression gases and oxygen-clean equipment — not ordinary recreational Nitrox.
Explore →Glossary
Air
The atmospheric gas mixture, consisting mainly of nitrogen and oxygen.
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Closed Circuit Rebreather Diver
Recycling breathing gas to extend duration, reduce bubbles and optimise oxygen exposure.
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Emergency Planning for Remote Australian Dive Trips
Build communications, oxygen, evacuation, medical and weather contingencies into trips where outside help may be hours away.
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Enriched Air Nitrox
Diving with elevated oxygen to extend no-decompression limits — the most commonly taken specialty.
Explore →Glossary
Nitrox
A nitrogen-and-oxygen breathing mixture; recreational enriched-air nitrox has more oxygen than ordinary air and requires appropriate training.
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Nitrox benefits and limits
Nitrox changes the balance of oxygen and nitrogen; it does not make every dive safer or allow unlimited depth.
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Regulator Servicing
Who services which brands, what oxygen cleaning involves, and why selling a regulator is not the same as servicing it.
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SSI Enriched Air Nitrox
Understand recreational nitrox planning, oxygen exposure and gas verification.
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TDI Advanced Nitrox Diver
Study higher-oxygen gas use and the practical discipline needed for advanced gas management.
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Technical Gas in Australia
Air, Nitrox, oxygen, helium and Trimix — what to verify and where it is actually available.
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Trimix Diver
Adding helium to manage narcosis, oxygen exposure and gas density at depth.
Explore →Beginner lessons
Breathing gases are not interchangeable
Recognise why a gas name implies training and limits.
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Cave Diving in Australia
The CDAA system, Mount Gambier, and why recreational certification does not apply.
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Closed Circuit Rebreathers
Recycled breathing gas, silent diving — and support that is specific to your exact unit.
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Cylinder Testing
Visual inspection, hydrostatic testing and valve servicing — and why inland divers care most.
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Dive Computers: Planning, Settings and Shared Decisions
Use a dive computer as a personal exposure model and information tool—not as permission to outsource the dive plan.
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Emergency planning for remote diving
Remoteness changes how long the team may need to support an injured diver.
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Gas analysis and identification
The cylinder you intend to breathe must match the gas you have planned for.
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Gas density and work of breathing
Depth changes how demanding it can be to move breathing gas through the system.
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