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                                                                      EXHIBIT 11


TIDEWATER INC.
COMPUTATION OF EARNINGS AND SHARES USED IN ARRIVING AT
PRIMARY AND FULLY-DILUTED EARNINGS PER SHARE FOR THE
QUARTER AND SIX-MONTH PERIOD ENDED SEPTEMBER 30, 1996





                                                   Quarter Ended                       Six Months Ended
                                                 September 30, 1996                   September 30, 1996
                                                 ------------------                   ------------------
                                                                                              
Net earnings (in thousands)                        $     32,952                         $       57,322 
                                                   ============                         ============== 
                                                                                                       
Computation of weighted                                                                                
average number of shares                                                                               
outstanding:                                                                                           
- -------------------------------                                                                        
                                                                                                       
       Issued:  62,022,356 shares                                                                      
                                                                                                       
       Weighted average shares                                                                         
       outstanding                                   62,013,762                             61,979,502 
                                                                                                       
       Plus incremental shares                                                                         
              applicable to stock                                                                      
              options                                   581,166                                648,624 
                                                   ------------                         -------------- 
                                                                                                       
       Weighted average common                                                                         
       shares and equivalents                        62,594,928                             62,628,126 
                                                   ============                         ============== 
                                                                                                       
       Primary and fully diluted                                                                       
       earnings per common share                   $        .53                         $          .92 
                                                   ============                         ============== 
                                             
                                                     
                                                                 



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