Exhibit 12 LOCKHEED MARTIN CORPORATION COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES FOR THE QUARTER ENDED MARCH 31, 1997 (In millions, except ratio) EARNINGS: Net earnings $290 Income tax expense 186 Interest expense 201 Amortization of debt premium and discount, net (1) Portion of rents representative of an interest factor 31 ---- Adjusted earnings before taxes and fixed charges $707 ==== FIXED CHARGES: Interest expense $201 Amortization of debt premium and discount, net (1) Portion of rents representative of an interest factor 31 Capitalized interest 1 ---- Total fixed charges $232 ==== RATIO OF EARNINGS TO FIXED CHARGES 3.0 ==== 19