1 EXHIBIT 12.1 DIAMOND OFFSHORE DRILLING, INC. STATEMENT RE COMPUTATION OF RATIOS (THOUSANDS OF DOLLARS) RATIO OF EARNINGS TO FIXED CHARGES: YEAR ENDED DECEMBER 31, ---------------------------------------------------- 1997 1996 1995 1994 1993 -------- -------- -------- -------- -------- COMPUTATION OF EARNINGS: Pretax income from continuing operations............................. $430,061 $212,705 $(13,803) $(46,425) $(21,670) Less: Interest capitalized during the period and actual preferred dividend requirements of majority-owned subsidiaries and 50%-owned persons included in fixed charges but not deducted from pretax income from above........... (4,382) (3,973) -- -- -- Add: Previously capitalized interest amortized during the period......... 192 -- -- -- -- -------- -------- -------- -------- -------- Total earnings, before fixed charge addition............................... 425,871 208,732 (13,803) (46,425) (21,670) -------- -------- -------- -------- -------- COMPUTATION OF FIXED CHARGES: Interest, including interest capitalized............................ 15,241 6,831 27,052 31,346 25,906 -------- -------- -------- -------- -------- Total fixed charges...................... 15,241 6,831 27,052 31,346 25,906 -------- -------- -------- -------- -------- TOTAL EARNINGS AND FIXED CHARGES......... 441,112 215,563 13,249 (15,079) 4,236 -------- -------- -------- -------- -------- RATIO OF EARNINGS TO FIXED CHARGES(1).... 28.94 31.56 -- -- -- ======== ======== ======== ======== ======== - --------------- (1) The deficiency in the Company's earnings available for fixed charges for the years ended December 31, 1995, 1994, and 1993 was approximately $13.8 million, $46.4 million, and $21.7 million, respectively.