Relationship between diving depth and accumulation of nitrogen
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                  The accumulation of nitrogen after deep diving is more than after shallow diving.   | 
                
                
                  
                  
                    
                      
                          
                        Shallow diving 
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                        Deep diving 
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                    Relationship between Bottom Time and Accumulation of Nitrogen
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                  The accumulation of nitrogen after the long Bottom Time is more than the one after the short Bottom Time.  | 
                
                
                  
                  
                    
                      
                          Short bottom time diving
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                          Long bottom time diving
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                    The relationship between the diving depth and the accumulation of nitrogen
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                  The quantity of nitrogen that diver has ① in the first diving depth is deeper than the second diving depth is more than the one that diver has ② in the first diving is shallow and the second diving depth is deep.  | 
                
                
                  
                  
                    
                      
                          First diving<Deep>  ⇒  Second diving<Shallow>
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                          First diving<Shallow>  ⇒  Second diving<Deep>
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                        Plan your diving schedule that is Second diving depth is shallower than First diving depth!  | 
                       
                    
                   
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