<Table 3> How to use No-decompression Dive Limit - Residual Nitrogen
                  Time Table?  | 
                
                
                  You can examine No-decompression Dive Limit and Residual Nitrogen Time
                  after Surface Interval Time in <Table 3> No-decompression Dive Limit
                  - Residual Nitrogen Time Table.  | 
                
                
                    You can examine the No-decompression Dive Limit for the second diving 
  | 
                
                
                  
                  
                    
                      
                          | 
                        A diver of Residual Group E at the time of the first diving end plans the second diving of 15 m after 1 hour 30 minutes Surface Interval Time.What is the new no-decompression dive time?   | 
                       
                      
                         | 
                        《The usage of Dive Table》 
                        ① Residual Group at the time of the first diving end is E in <Table
                        2> Surface Interval Time Table. 
                        ② You just trace aside from E and look for Surface Interval Time that is 1 hour 30 minutes or over 1 hour 30 minutes and closer to 1 hour 30 minutes.1 hour 30 minutes is between 1 hour and 2 hours.You just trace the line between 1 hour and 2 hours below. 
                        ③ You can look for the contact of the point traced 15 m aside and the point
                        traced the ② line in <Table 3> No-decompression Dive Limit - Residual
                        Nitrogen Time Table.  | 
                       
                    
                   
                   | 
                
                
                  
                  
                    
                      
                          | 
                       
                      
                        | 
                   a) Surface Interval Time. 1 hour 30 minutes is between 1 hour and 2 hours. b) No-decompression Dive Limit  | 
                       
                    
                   
                   | 
                
                
                  
                  
                    
                      
                          | 
                        Correct answer: 51 minutes 
                        A number of the top right corner is the new No-decompression Dive Limit at the contact.  
                        A diver of Residual Group E at the time of the first diving end can plans the second diving of 51 minutes at 15 m after 1 hour 30 minutes Surface Interval Time.  | 
                       
                    
                   
                   | 
                
                
                  
                  
                    
                      
                          | 
                        If Surface Interval Time is 1 hour, you should use the line between 30minutes and 1 hour for your safety.  | 
                       
                    
                   
                   | 
                
                
                   
                   |