Exhibit 12.1

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

RATIO OF EARNINGS TO FIXED CHARGES

(Dollars in thousands)

				Nine Months Ended September 30, 2003
Earnings:
Income before income taxes				$	280,036
Add:
Interest expense					92,262
Amortization of debt expense					5,970
Interest component of rent expense					18,210
Earnings				$	396,478
Fixed Charges:
Interest expense					92,262
Amortization of debt expense					5,970
Interest component of rent expense					18,210
Fixed Charges				$	116,442
Ratio of earnings to fixed charges					3.4	x