 How to examine Residual Group at the end of First diving?
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At the end of the first diving, you should examine Residual Group to know the quantity of internal nitrogen.
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Which is the Residual Group in case of the Bottom Time is 30 minutes at 18m? |
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《The usage of the Dive Table》
① You trace depth (D)18m aside.
② You look for Bottom Time 30minutes. And then, you trace it in above.
③ The Residual Group is E. |
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a) Diving depth b) Bottom Time c) Residual Group |
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Correct answer： E
When you stayed 30 minutes at 18m, the quantity of internal nitrogen is E level.（As the alphabet nears G, the quantity of internal nitrogen increases.） |
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*A Dive Table term*
■Residual Group
The level of the residual nitrogen is showed in the alphabet. As it goes to G nearly from A, the quantity of residual nitrogen becomes high-level.
■Residual Group Table
You are able to know the level (the alphabet) of residual nitrogen after one diving end.
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