Exhibit 12.1

L-3 COMMUNICATIONS HOLDINGS, INC. AND
L-3 COMMUNICATIONS CORPORATION

RATIO OF EARNINGS TO FIXED CHARGES

(Dollars in thousands)

				Three Months Ended March 31, 2004
Earnings:
Income before income taxes				$	113,399
Add:
Interest expense					34,747
Amortization of debt expense					1,788
Interest component of rent expense					5,386
Earnings				$	155,320
Fixed Charges:
Interest expense					34,747
Amortization of debt expense					1,788
Interest component of rent expense					5,386
Fixed Charges				$	41,921
Ratio of earnings to fixed charges					3.7	x