1 EXHIBIT 12 IRIDIUM OPERATING L.L.C. COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES ($ IN THOUSANDS) PRIOR PERIOD TO INITIAL CAPITAL CONTRIBUTION DATE PERIODS FOLLOWING INITIAL CAPITAL CONTRIBUTION DATE ------------------ ----------------------------------------------------- December 31, January 1, 1993 July 29, 1993 to -------------------------- to July 28, 1993 December 31, 1993 1994 1995 ---------------- ----------------- ----- ----- Fixed charges: Capitalized interest ................. - - - - Portion of rent expense representative of interest (1) ...................... - 54 264 342 -------- ----- ------ ---- Total fixed charges................. - 54 264 342 ======== ===== ===== === Earnings: Loss before income taxes........... (5,309) (6,751) (13,309) (21,961) Fixed charges, less capitalized interest......................... - 54 264 342 Amortization of capitalized interest......................... - - - - ------- ------ ------ ----- Earnings adjusted for fixed charges.............. (5,309) (6,697) (13,045) (21,619) ======== ====== ========= ======== Ratio of earnings to fixed charges... - - - - Deficiency in earnings to cover fixed charges...................... 5,309 6,751 13,309 21,961 PERIODS FOLLOWING INITIAL CAPITAL CONTRIBUTION DATE ----------------------------------------------------- December 31, Nine --------------------- Months Ended 1996 1997 September 30, 1998 ----- ------ ------------------ Fixed charges: Capitalized interest ................. 28,127 163,747 247,448 Portion of rent expense representative of interest (1) ...................... 398 3,858 4,687 ----- ------ ------- Total fixed charges................. 28,525 167,605 252,135 ======= ======= ======== Earnings: Loss before income taxes........... (69,009) (293,401) (812,510) Fixed charges, less capitalized interest......................... 398 3,858 4,687 Amortization of capitalized interest......................... - 7,900 24,649 ----- ------- ------- Earnings adjusted for fixed charges.............. (68,611) (281,643) (787,861) ======= ======== ========= Ratio of earnings to fixed charges... - - - Deficiency in earnings to cover fixed charges...................... 97,136 449,248 1,039,996 - ------------ (1) One-third of rent expense is deemed to be representative of interest.