Exhibit 12.1

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

RATIO OF EARNINGS TO FIXED CHARGES

(DOLLARS IN THOUSANDS)

				Six Months Ended June 30, 2003
Earnings:
Income before income taxes				$	161,119
Add:
Interest expense					61,880
Amortization of debt expense					3,992
Interest component of rent expense					12,128
Earnings				$	239,119
Fixed Charges:
Interest expense					61,880
Amortization of debt expense					3,992
Interest component of rent expense					12,128
Fixed Charges				$	78,000
Ratio of earnings to fixed charges					3.1	x