SCUBA DIVING UNIVERSITY / SAFETY

The scuba diving safety library

Sixty focused guides to help you recognise hazards, understand the science and ask better questions before your next dive.

6 sections · 10 lessons each

YouDive mascot illustration for The scuba diving safety library; not an instructional demonstration

YouDive educational guide · References checked 30 September 2026 · Independent instructor and medical review pending. This library does not provide certification, individual medical clearance or a dive plan.

SECTION 01 · 10 LESSONS

Build safer diving habits

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Make better decisions before entering the water. Plan with your buddy, check your equipment and recognise when to change or cancel a dive.

01Are you ready to dive today?02Build a shared dive plan 03Make the buddy check meaningful 04Understand your gas reserve 05Calling the dive without pressure 06Recognise stress before it escalates 07Medical screening and honest disclosure 08Medication, alcohol and fatigue 09Returning after a break 10Questions to ask a dive operator

SECTION 02 · 10 LESSONS

Decompression & pressure

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Understand what pressure does to your body, how decompression risk develops and why a computer cannot guarantee an injury-free dive.

01What decompression means 02DCS, AGE and decompression illness 03Recognising possible decompression sickness 04What your dive computer cannot know 05Safety stops and mandatory stops 06Repetitive and multi-day diving 07Flying and altitude after diving 08Exercise, temperature and hydration 09Ear and sinus pressure problems 10Lung overexpansion and breath-holding

SECTION 03 · 10 LESSONS

Oxygen, narcosis & breathing gases

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Separate the effects of oxygen, nitrogen and carbon dioxide. Learn why gas selection, analysis and breathing workload belong in the same conversation.

01Oxygen toxicity explained 02Understanding partial pressure 03Nitrox benefits and limits 04Maximum operating depth is a boundary 05Nitrogen narcosis and judgement 06Carbon dioxide retention 07Gas density and work of breathing 08Hypoxia and inadequate oxygen 09Contaminated breathing gas 10Gas analysis and identification

SECTION 04 · 10 LESSONS

Deep & technical diving risks

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Understand the extra commitments created by depth, decompression and overhead environments before choosing specialist instruction.

01Why deeper diving changes the risk 02Certification limits and personal limits 03The commitment of planned decompression 04Overhead environments 05Wreck penetration and structural hazards 06Gas-switching mistakes 07Redundancy that actually works 08Rebreathers: a different risk picture 09Task loading and attention 10Choosing technical instruction

SECTION 05 · 10 LESSONS

Conditions & equipment

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Apply risk awareness to Australian shore entries, currents, boats, cold water and equipment problems.

01Reading weather and swell 02Currents and tides 03Shore entries and exits 04Boats, ladders and propellers 05Cold water and hypothermia 06Low visibility and night diving 07Entanglement and line hazards 08Buoyancy and weighting 09Equipment faults and maintenance 10Marine life and injury prevention

SECTION 06 · 10 LESSONS

Emergencies & recovery

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Recognise trouble early, summon appropriate help and support the handover to emergency professionals.

01Make an emergency action plan 02When to call 000 after diving 03Emergency oxygen first aid 04Drowning and resuscitation awareness 05Immersion pulmonary oedema 06Buddy separation and missing divers 07Assisting a distressed diver 08Recording an incident and medical handover 09Emergency planning for remote diving 10Returning after a diving incident