．SSI Freediver Certificate Course
For those who have goals and would like to take on challenges.
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．SSI Basic Freediver Certificate Course
No performance requirement. Learn freediving skills and knowledges with joy.
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For those who would like to get a taste of freediving and just explore the ocean.
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For those who have Freediving licensees or have finished certificate course.
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Techniques training.
For example, Frenzel equalization, DYN, CWT etc.。
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．SSI Advanced Freediver Certificate Course
Advanced freediving techniques and correction of detail freediving skills.
（Requirement : SSI Freediver or relative freediving licensees.）
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