THE YOUDIVE LIBRARY
Stay curious. Keep learning.
Practical guides, course comparisons and diving knowledge, with an Australian perspective.
Looking for a lesson or a definition?
Search beginner lessons, safety guides, courses and glossary terms together.
Search the whole learning libraryFOUR WAYS TO GO DEEPER
Know the ocean. Plan the season. Keep learning.
Australian Marine Life
Ten marine-life profiles with identification clues, habitat context, reference photographs and observation exercises for Australian divers.
Explore 10 resources →02When to Dive Australia
Compare Australian diving seasons by region, plan wildlife visits and distinguish climate patterns from current marine forecasts.
Explore 10 resources →03Your First 20 Dives
Ten learning lessons for newly certified divers: supported outings, equipment familiarity, coaching, buddy communication, useful logs and the next course.
Explore 10 resources →04Become a Diving Instructor
Explore the PADI Divemaster, IDC and Instructor Examination pathway in Australia, including prerequisites, costs, preparation, Course Directors and first jobs.
Explore 10 resources →
technical
Advanced Nitrox
High-oxygen decompression gases and oxygen-clean equipment — a different capability from recreational Nitrox.
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technical
Cave Diving in Australia
The CDAA system, Mount Gambier, and why recreational certification does not apply.
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technical
Closed Circuit Rebreathers
Recycled breathing gas, silent diving — and support that is specific to your exact unit.
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technical
Decompression Diving
When the option of a direct ascent is deliberately given up, and what that changes.
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guide
How to Choose a Divemaster Internship
Compare mentoring, real course involvement, workload, total cost and employment claims before committing weeks or months to a professional programme.
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guide
How to Choose a Technical Diving Instructor
Evaluate current diving, configuration, failure standards, mentoring and local support before comparing agency logos.
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comparison
PADI Divemaster vs SSI Divemaster
Both lead into recreational dive leadership, but the programme structure, intermediate rating and centre relationship differ.
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comparison
PADI TecRec vs SSI Extended Range
Two technical-diving systems with different course packaging, terminology and centre models—from first decompression to Trimix and CCR.
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technical
Sidemount Diving
Cylinders at your sides — redundancy, streamlining and restriction access.
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comparison
Sidemount vs Backmount Twinset
Two ways to carry redundant gas, and what actually drives the choice.
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comparison
TDI vs PADI TecRec
A technical-first agency compared with the technical branch of the world's largest recreational training network.
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technical
Trimix
Helium in the breathing mix — and the gas logistics that determine whether a trip is possible.
Read guideOur upcoming editorial topics
WHAT’S NEXT
Topics in development
These guides are planned and are not available to read yet.
Technical foundations 1 planned
- What is technical diving?In development
Freediving and snorkelling 5 planned
- How do I choose a freediving course?In development
- How do pool and open-water freediving programmes differ?In development
- Why does freediving require specific buddy training?In development
- How do I choose a guided snorkelling experience?In development
- How should I choose between snorkelling and scuba on a reef trip?In development
Professional progression 8 planned
- What does a divemaster do?In development
- What does becoming a scuba instructor involve?In development
- How do I compare instructor-development programmes?In development
- How do I research employment at Australian dive centres?In development
- What should I know about working on dive boats?In development
- How can diving professionals maintain their knowledge?In development
- What should I know before starting a dive business?In development
- How can an experienced diver contribute to YouDive?In development
Overhead and specialist environments 9 planned
- How do cavern and cave diving differ?In development
- How do Australian cave-diving qualifications and access permissions interact?In development
- How does wreck penetration differ from an exterior wreck dive?In development
- How do specialist divers assess a training pathway?In development
- What should I know about mine and tunnel diving?In development
- What should I know about altitude diving?In development
- What should I know about scientific diving?In development
- What should I know about commercial diving careers?In development
- How do expedition divers organise support?In development