L-3 Communications Essco S-4 2009 FY Registration of securities issued in business combination transactions

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the use in this Registration Statement on Form S-4 of L-3 Communications Corporation of our report dated February 26, 2010 relating to the financial statements and the effectiveness of internal control over financial reporting of L-3 Communications Holdings, Inc. and L-3 Communications Corporation, which appear in such Registration Statement. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP
New York, New York
March 26, 2010