EXHIBIT 11 TIDEWATER INC. COMPUTATION OF EARNINGS AND SHARES USED IN ARRIVING AT PRIMARY AND FULLY-DILUTED EARNINGS PER SHARE FOR THE QUARTER AND NINE-MONTH PERIOD ENDED DECEMBER 31, 1995 Quarter Ended Nine Months Ended December 31, 1995 December 31, 1995 ------------------ ----------------- Net Earnings (in thousands) $ 21,521 $ 59,262 =========== =========== Computation of weighted average number of shares outstanding: - ------------------------------ Issued: 53,337,457 shares Weighted average shares outstanding 53,334,165 53,295,834 Add: Incremental shares applicable to stock options 508,763 436,013 ----------- ----------- Weighted average common shares and equivalents 53,842,928 53,731,847 =========== =========== Primary and fully diluted earnings per common share $ .40 $ 1.10 =========== ===========