Beginner lessons
A useful buddy debrief
Turn an experience into specific learning questions.
Read resource →THE DIVER’S RESOURCE CENTRE
Better questions. Useful answers.
Find a lesson, look up a word, check the forecast or find the manual for your gear. Bring your next diving question here.
FIND YOUR NEXT ANSWERNEW / INTERACTIVE TOOLS
Planners, checklists & logs
Eight tools to organise a trip, compare courses, keep equipment records and prepare useful notes.
Open the tools →01 / BEFORE YOU TRAVELWeather & dive preparation
Official forecasts, tide information and a worksheet to take to your briefing.
Open the preparation resources →02 / KNOW YOUR EQUIPMENTManuals & manufacturer support
Find the correct documents for your model and prepare a useful support enquiry.
Find your brand →Search the whole learning library
Search published guides, beginner lessons, safety topics, courses, brands and glossary definitions. Planned articles are excluded.
355 learning resourcesRead each page’s review status
Glossary
Absolute pressure
Pressure measured relative to a vacuum, including the atmospheric contribution.
Read resource →Beginner lessons
Accessories with a purpose
Connect an accessory to a specific use and learning need.
Read resource →Guides
Advanced Nitrox
High-oxygen decompression gases and oxygen-clean equipment — a different capability from recreational Nitrox.
Read resource →Courses
Advanced Nitrox
High-oxygen decompression gases and oxygen-clean equipment — not ordinary recreational Nitrox.
Read resource →Courses
Advanced Open Water Diver
Five guided specialty dives that extend depth to 30 metres and introduce navigation and other skills.
Read resource →Beginner lessons
After your first certification
Plan continuing learning within your current experience.
Read resource →Beginner lessons
Agreeing communication
Understand why signals should be confirmed in advance.
Read resource →Glossary
Air
The atmospheric gas mixture, consisting mainly of nitrogen and oxygen.
Read resource →Guides
Air Fills
The most basic dive service, and one worth checking for hours, pressure and cylinder requirements.
Read resource →Glossary
Algorithm
A defined calculation process; dive computers use algorithms to process measurements and settings.
Read resource →Beginner lessons
Alternatives and contingencies
Treat changing a plan as a normal decision.
Read resource →Glossary
Ambient light
Light already present in the environment, rather than added by a torch or strobe.
Read resource →Beginner lessons
An experience or a certification?
Explain why an introductory experience and a qualification are different.
Read resource →Brands
Apeks
Apeks presents a technically focused range covering regulators, BCDs, suits, masks, fins and torches. Its catalogue is a useful place to research equipment configurations with an instructor or experienced retailer.
Read resource →Brands
Aqua Lung
Aqua Lung, styled Aqualung on its current website, offers regulators, BCDs, computers and gauges, masks, fins, snorkels and accessories. Explore the category first, then compare the exact model and configuration.
Read resource →Safety guides
Are you ready to dive today?
A safe decision starts with the diver you are today, not the number of dives in your logbook.
Read resource →Safety guides
Assisting a distressed diver
Helping effectively begins with recognising your limits and protecting the rescuer.
Read resource →Beginner lessons
Attention and position
Recognise attention as part of diving together.
Read resource →Guides
Australian Dive Itineraries
Realistic three-, five- and seven-day diving plans that keep travel time under control and leave room for weather.
Read resource →Guides
Australian Dive Trip Packing List
What to bring, what to rent and what to confirm for tropical, temperate, shore and liveaboard diving in Australia.
Read resource →Interactive tools
Australian dive trip planner
Organise dates, operators, transport, site research and alternatives in one saved worksheet.
Read resource →Guides
Australian wreck diving guide
Ten chapters on researching wreck diving and its training boundaries.
Read resource →Glossary
Backscatter
Light scattered back towards a camera or observer by particles in the water.
Read resource →Looking for a place or an operator?
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