Exhibit 3.11

                            RESTATED CERTIFICATE OF
                                 INCORPORATION
                                       OF
                            ELECTRONIC SPACE SYSTEMS
                                  CORPORATION

         Electronic Space Systems Corporation, originally incorporated as
Electronic Space Structures Corporation on July 5, 1961, a corporation
organized and existing under the General Corporation Law of the State of
Delaware hereby certifies that its Board of Directors, by unanimous written
consent of its members filed with the minutes of the Board, duly adopted a
Restated Certificate of Incorporation in accordance with the provisions of
Section 245 of the General Corporation Law, effective June 1, 1982, which only
restates and integrates and does not further amend the provisions of the
corporation's Certificate of Incorporation as heretofore amended or
supplemented, there being no discrepancies between those provisions and the
provisions of this restated certificate.

                              ------------------

         We, the undersigned, for the purpose of associating to establish a
corporation for the transaction of the business and the promotion and conduct
of the objects and purposes hereinafter stated, under the provisions and
subject to the requirements of the laws of the State of Delaware (particularly
Chapter 1, Title 8 of the 1953 Delaware Code and the acts amendatory thereof
and supplemental thereto, and known as the "General Corporation Law of the
State of Delaware"), do make and file this Certificate of Incorporation in
writing and do hereby certify as follows, to wit:

         FIRST: The name of the corporation (hereinafter called the corporation)
is

                      ELECTRONIC SPACE SYSTEMS CORPORATION

         SECOND: The respective names of the County and of the City within the
County in which the principal office of the corporation is to be located in the
State of Delaware are the County of New Castle and the City of Wilmington. The
name of the registered agent of the corporation is The Corporation Trust
Company. The street and number of said registered office and the address by
street and number of said registered agent is 100 West Tenth Street,
Wilmington, Delaware.

         THIRD: The nature of the business of the corporation and the objects
or purposes to be transacted, promoted or carried on by it are as follows:

          To conduct research with respect to, design, manufacture, sell and
     otherwise deal with antennas, antenna systems, radomes, hardened
     structures to resist the effect of blast from nuclear explosion and
     fallout, structures for industrial and resident use, electrical,
     mechanical, electro-mechanical and electronic equipment, machinery and
     components.





          To endorse, assume and/or guarantee, as accommodation endorser,
     guarantor or otherwise, the performance and/or payment of any leases,
     contracts, notes, debentures, mortgages or other evidences of indebtedness
     or obligations of any person, partnership, corporation, firm or
     association or other parties, whether or not the corporation has a direct
     or indirect interest in the subject matter with respect to which such
     leases, contracts, notes, debentures or other evidences of indebtedness
     are being executed or issued and/or in the obligors or makers of such
     leases, contracts, notes, debentures or any other parties thereto.

          To acquire by purchase, exchange, concession, easement, contract,
     lease or otherwise, to hold, own, use, control, manage, improve, maintain
     and develop, to mortgage, pledge, grant, sell, convey, exchange, assign,
     divide, lease, sublease, or otherwise encumber and dispose of, and to deal
     and trade in, real estate improved or unimproved, lands, leaseholds,
     options, concessions, easements, tenements, hereditaments and interests in
     real, mixed, and personal property, of every kind and description
     wheresoever situated, and any and all rights therein.

               To manufacture, process, purchase, sell and generally to trade
          and deal in and with goods, wares and merchandise of every kind,
          nature and description, and to engage and participate in any
          mercantile, industrial or trading business of any kind or character
          whatsoever.

               To apply for, register, obtain, purchase, lease, take licenses
          in respect of or otherwise acquire, and to hold, own, use, operate,
          develop, enjoy, turn to account, grant licenses and immunities in
          respect of, manufacture under and to introduce, sell, assign,
          mortgage, pledge or otherwise dispose of, and, in any manner deal
          with and contract with reference to:

          (a)  inventions, devices, formulae, processes and any improvements
               and modifications thereof;

          (b)  letters patent, patent rights, patented processes, copyrights,
               designs, and similar rights, trade-marks, trade symbols and
               other indications of origin, and ownership granted by or
               recognized under the laws of the United States of America or of
               any state or subdivision thereof, or of any foreign country or
               subdivision thereof, and all rights connected therewith or
               appertaining thereunto;

          (c)  franchises, licenses, grants and concessions,

               To purchase or otherwise acquire, and to hold, mortgage, pledge,
          sell, exchange or otherwise dispose of, securities (which term, for
          the purpose of this Article THIRD, includes, without limitation of
          the generality thereof, any shares of stock, bonds, debentures,
          notes, mortgages, or other obligations, and any certificates,
          receipts or other instruments representing rights to receive,
          purchase or subscribe for the same, or representing any other rights
          or interests therein or in any property or assets) created or issued
          by any persons, firms, associations, corporations, or governments or
          subdivisions thereof; to make payment therefor in any lawful manner;
          and to exercise, as owner or holder of any securities, any and all
          rights, powers and privileges in respect thereof.

                                      -2-




               To make, enter into, perform and carry out contracts of every
          kind and description with any person, firm, association, corporation
          or government or subdivision thereof.

               To acquire by purchase, exchange or otherwise, all, or any part
          of, or any interest in, the properties, assets, business and good
          will of any one or more persons, firms, associations or corporations
          heretofore or hereafter engaged in any business for which a
          corporation may now or hereafter be organized under the laws of the
          State of Delaware; to pay for the same, in cash, property or its own
          or other securities; to hold, operate, reorganize, liquidate, sell or
          in any manner dispose of the whole or any part thereof; and in
          connection therewith, to assume or guarantee performance of any
          liabilities, obligations or contracts of such persons, firms,
          associations or corporations, and to conduct the whole or any part of
          any business thus acquired.

               To lend its uninvested funds from time to time to such extent,
          to such persons, firms, associations, corporations, governments or
          subdivisions thereof, and on such terms and on such security, if any,
          as the Board of Directors of the corporation may determine.

               To endorse or guarantee the payment of principal, interest or
          dividends upon, and to guarantee the performance of sinking fund or
          other obligations of, any securities, and to guarantee in any way
          permitted by law the performance of any of the contracts or other
          undertakings in which the corporation may otherwise be or become
          interested, of any person, firm, association, corporation, government
          or subdivision thereof, or of any other combination, organization or
          entity whatsoever.

               To borrow money for any of the purposes of the corporation, from
          time to time, and without limit as to amount; from time to time to
          issue and sell its own securities in such amounts, on such terms and
          conditions, for such purposes and for such prices, now or hereafter
          permitted by the laws of the State of Delaware and by this
          Certificate of Incorporation, as the Board of Directors of the
          corporation may determine; and to secure such securities by mortgage
          upon, or the pledge of, or the conveyance or assignment in trust of,
          the whole or any part of the properties, assets, business and good
          will of the corporation, then owned or thereafter acquired,

               To draw, make, accept, endorse, discount, execute, and issue
          promissory notes, drafts, bills of exchange, warrants, bonds,
          debentures, and other negotiable or transferable instruments and
          evidences of indebtedness whether secured by mortgage or otherwise,
          as well as to secure the same by mortgage or otherwise, so far as may
          be permitted by the laws of the State of Delaware.

               To purchase, hold, cancel, reissue, sell, exchange, transfer or
          otherwise deal in its own securities from time to time to such an
          extent and in such manner and upon such terms as the Board of
          Directors of the corporation shall determine; provided that the
          corporation shall

                                      -3-



          not use its funds or property for the purchase of its own shares of
          capital stock when such use would cause any impairment of its capital
          except to the extent permitted by law; and provided further that
          shares of its own capital stock belonging to the corporation shall
          not be voted upon directly or indirectly.

               To organize or cause to be organized under the laws of the State
          of Delaware, or of any other State of the United States of America,
          or of the District of Columbia, or of any territory, dependency,
          colony or possession of the United States of America, or of any
          foreign country, a corporation or corporations for the purpose of
          transacting, promoting or carrying on any or all of the objects or
          purposes for which corporations may be organized, and to dissolve,
          wind up, liquidate, merge or consolidate any such corporation or
          corporations or to cause the same to be dissolved, wound up,
          liquidated, merged or consolidated.

               To conduct its business in any and all of its branches and
          maintain offices both within and without the State of Delaware, in
          any and all States of the United States of America, in the District
          of Columbia, in any or all territories, dependencies, colonies or
          possessions of the United States of America, and in foreign
          countries,

               To carry out all or any part of the foregoing objects and
          purposes in any and all parts of the world and to conduct business in
          all or any of its branches as principal, factor, agent, contractor or
          otherwise, either alone or through or in conjunction with any
          corporations, associations, partnerships, firms, trustees,
          syndicates, individuals, organizations and other entities located in
          or organized under the laws of any part of the world, and, in
          carrying out, conducting or performing its business and attaining or
          furthering any of its objects and purposes, to maintain offices,
          branches and agencies in any part of the world, to make and perform
          any contracts and to do any acts and things, and to carry on, any
          business, and to exercise any powers suitable, convenient or proper
          for the accomplishment of any of the objects and purposes herein
          specified or which at any time may appear conducive to or expedient
          for the accomplishment of any of such objects and purposes and which
          might be engaged in or carried on by a corporation formed under the
          General Corporation Law and to have and exercise all of the powers
          conferred by the laws of the State of Delaware upon corporations
          formed under the General Corporation Law.

         The foregoing provisions of this Article THIRD shall be construed both
as purposes and powers and each as an independent purpose and power. The
foregoing enumeration of specific purposes and powers shall not be held to
limit or restrict in any manner the purposes and powers of the corporation, and
the purposes and powers herein specified shall, except when otherwise provided
in this Article THIRD, be in no wise limited or restricted by reference to, or
inference from, the terms of any provision of this or any other Article of this
Certificate of Incorporation; provided, that the corporation shall not carry on
any business or exercise any power in the State of Delaware or in any state,
territory, or country which under the laws thereof the corporation may not
lawfully carry on or exercise.


                                      -4-






         FOURTH: The total number of shares of all classes of stock which the
corporation shall have authority to issue is Five Hundred and Seven Thousand
(507,000) of which Five Hundred Thousand (500 000) shares shall be of a class
designated Common Stock and have a par value of Twenty Cents ($.20) each; and
seven thousand (7,000) shares shall be of a class designated Series Preferred
Stock and have a par value of One Hundred ($100) Dollars.

         Section A; Provisions Relating to Series Preferred Stock

          The Series Preferred Stock may be issued from time to time in one or
     more series with such distinctive serial designations, at such price or
     prices and for such other consideration, and with such preferences, rights
     and privileges and subject to such qualifications, limitations and
     restrictions, as shall be determined and fixed by the Board of Directors
     as hereinafter provided in this Section A. All the shares of any one
     series shall be alike in every particular. In no event shall any share of
     any series be entitled to more than one vote.

          The Board of Directors is hereby expressly empowered to determine and
     fix by resolution or resolutions providing for the issuance of such
     series:

          (i) The number of shares to constitute each such series and the
     designation thereof:

          (ii) Whether or not the shares of such series shall be entitled to
     receive notice of Shareholders' meetings, and the voting powers, full,
     limited or contingent, if any, to which holders of shares of any series
     shall be entitled;

          (iii) The dividend rate or rates, the conditions and dates upon which
     such dividends shall be payable, the relation which such dividends shall
     bear to the dividends payable on any other class or classes or series of
     stock, and whether such dividends shall be cumulative or noncumulative;

          (iv) Whether or not the shares of such series shall be redeemable
     and, if redeemable, the redemption price and the terms and conditions
     thereof;

          (v) The amount, if any, which the shares of any such series shall be
     entitled to receive in the event of any liquidation, dissolution or
     winding up of the affairs of the corporation, whether voluntary or
     involuntary or of any proceedings resulting in any distribution of all or
     substantially all, of its assets to its stockholders;

          (vi) Whether or not the shares of such series shall be subject to the
     operation of retirement or sinking funds to be applied to the purchase or
     redemption of such shares and, if such funds are established, the annual
     amount thereof and the terms and provisions relative to the operation
     thereof;

                                      -5-



          (vii) Whether or not the shares of such series shall be convertible
     into, or exchangeable for, shares of any other class or classes or of any
     other series of the same or any other class of stock of the corporation,
     and, if convertible or exchangeable, the conversion price or prices or
     rate or rates of conversion or exchange and such other terms and
     conditions of conversion or exchange as shall be stated in said resolution
     or resolutions, and

          (viii) Such other designations, preferences, and relative,
     participating, optional or other special rights and qualifications,
     limitations or restrictions thereof as it may deem advisable and as shall
     be stated in said resolution or resolutions.

         Section B. Provisions Relating to Common and Series Preferred Stock

          (i) Fully Paid and Non-Assessable: Any and all shares of capital
     stock issued, and for which the full consideration has been paid or
     delivered, shall be deemed fully paid stock and the holder of such shares
     shall not be liable for any further call or assessment or any other
     payment thereon.

          (ii) Denial of Pre-emptive Rights: No holder of any of the shares of
     capital stock of the corporation shall be entitled as of right to purchase
     or subscribe for any unissued stock of any existing class or any new or
     additional shares of any class to be issued by reason of any increase of
     the authorized capital stock of the corporation of any class, or bonds,
     certificates of indebtedness, debentures or other securities convertible
     into stock of the corporation, or carrying any right to purchase stock of
     any class, but any such unissued stock, or such new or additional
     authorized issue of any stock or of other securities convertible into
     stock, or carrying any right to purchase stock, may be issued and disposed
     of pursuant to resolution of the Board of Directors to such persons,
     firms, corporations or associations and upon such terms as may be deemed
     advisable by the Board of Directors in the exercise of its discretion.

          (iii) The holders of Common Stock issued and outstanding, except
     where otherwise provided by law or by these Articles of Incorporation
     shall have and possess the exclusive right to notice of Shareholders'
     meetings and the exclusive voting rights and powers, and the holders of
     shares of the Series Preferred Stock shall not have any voting rights or
     be entitled to receive any notice of meetings of Stockholders, except
     where such notice or vote is required by the laws of the State of Delaware
     or by a resolution of the Board of Directors expressly providing for such
     notice of Shareholders' meetings and such voting rights.

         FIFTH: The minimum amount of capital with which the corporation will
commence business is One Thousand Dollars.

         SIXTH: The names and places of residence of each of the incorporators
are as follows:

        NAME                                PLACE OF RESIDENCE
        ----                                ------------------
R. G. Dickerson                               Dover, Delaware
J. A. Kent                                    Dover, Delaware
Z.  A. Pool, III                              Dover, Delaware

                                   -6-





         SEVENTH: The corporation is to have perpetual existence.

         EIGHTH: The private property of the stockholders of the corporation
shall not be subject to the payment of corporate debts to any extent whatever.

         NINTH: For the management of the business and for the conduct of the
affairs of the corporation, and in further definition, limitation and
regulation of the powers of the corporation and of its directors and
stockholders, it is further provided:

          1. The number of directors of the corporation shall be as specified
     in the By-Laws of the corporation but such number may from time to time be
     increased or decreased in such manner as may be prescribed by the By-Laws.
     In no event shall the number of directors be less than three. The election
     of directors need not be by ballot. Directors need not be stockholders.

          2. In furtherance and not in limitation of the powers conferred by
     the laws of the State of Delaware, the Board of Directors is expressly
     authorized and empowered:

          (a) To make, alter, amend, and repeal By-Laws, subject to the power
     of the stockholders to alter or repeal the By-Laws made by the Board of
     Directors.

          (b) Subject to the applicable provisions of the By-Laws then in
     effect, to determine, from time to time, whether and to what extent and at
     what times and places and under what conditions and regulations the 
     accounts and books of the corporation, or any of them, shall be open to
     the inspection of the stockholders, and no stockholder shall have any 
     right to inspect any account or book or document of the corporation, 
     except as conferred by the laws of the State of Delaware, unless and until
     authorized so to do by resolution of the Board of Directors or of the
     stockholders of the corporation.

          (c) Without the assent or vote of the stockholders, to authorize and
     issue obligations of the corporation, secured or unsecured, to include
     therein such provisions as to redeemability, convertibility or otherwise,
     as the Board of Directors, in its sole discretion, may determine, and to
     authorize the mortgaging or pledging, as security therefor, of any
     property of the corporation, real or personal, including after-acquired
     property.

          (d) To establish bonus, profit-sharing or other types of incentive or
     compensation plans for the employees (including officers and directors) of
     the corporation and to fix the amount of profits to be distributed or
     shared and to determine the persons to participate in any such plans and
     the amounts of their respective participations.

         In addition to the powers and authorities hereinbefore or by statute
expressly conferred upon it, the Board of Directors may exercise all such
powers and do all such acts and things as may be exercised or done by the
corporation, subject, nevertheless, to the provisions of the laws of the State
of Delaware, of the Certificate of Incorporation and of the By-Laws of the
corporation. 

                                      -7-



          3. Any director or any officer elected or appointed by the
     stockholders or by the Board of Directors may be removed at any time in
     such manner as shall be provided in the By-Laws of the corporation.

          4. In the absence of fraud, no contract or other transaction between
     the corporation and any other corporation, and no act of the corporation,
     shall in any way be affected or invalidated by the fact that any of the
     directors of the corporation are pecuniarily or otherwise interested in,
     or are directors or officers of, such other corporation; and, in the
     absence of fraud, any director, individually, or any firm of which any
     director may be a member, may be a party to, or may be pecuniarily or
     otherwise interested in, any contract or transaction of the corporation;
     provided, in any case, that the fact that he or such firm is so interested
     shall be disclosed or shall have been known to the Board of Directors or a
     majority thereof; and any director of the corporation who is also a
     director or officer of any such other corporation, or who is also
     interested, may be counted in determining the existence of a quorum at any
     meeting of the Board of Directors of the corporation which shall authorize
     any such contract, act or transaction and may vote thereat to authorize
     any such contract, act or transaction, with like force and effect as if he
     were not such director or officer of such other corporation, or not so
     interested.

          5. Any contract, act or transaction of the corporation or of the
     directors may be ratified by a vote of a majority of the shares having
     voting powers at any meeting of stockholders, or at any special meeting
     called for such purpose, and such ratification shall, so far as permitted
     by law and by this Certificate of Incorporation, be as valid and as
     binding as though ratified by every stockholder of the corporation.

         TENTH: From time to time any of the provisions of this Certificate of
Incorporation may be amended, altered or repealed, and other provisions
authorized by the laws of the State of Delaware at the time in force may be
added or inserted in the manner and at the time prescribed by said laws, and
all rights at any time conferred upon the stockholders of the corporation by
this Certificate of Incorporation are granted subject to the provisions of this
Article TENTH.

         IN WITNESS WHEREOF, said Electronic Space Systems Corporation has
caused this certificate to be signed by ALBERT COHEN, its President and
attested by STEVEN R. SCHEFF, its Secretary this 18th day of June, 1982.

                                        BY: /s/ Albert Cohen
                                            ----------------------------------
                                            President


ATTEST:                                                       [SEAL]

BY: /s/ Steven R. Scheff
    -------------------------------
    Secretary

                                      -8-

                                                 


                            CERTIFICATE OF AMENDMENT
                                       OF
                     RESTATED CERTIFICATE OF INCORPORATION
                                       OF
                      ELECTRONIC SPACE SYSTEMS CORPORATION

         ELECTRONIC SPACE SYSTEMS CORPORATION, originally incorporated as
Electronic Space Structures Corporation on July 5, 1961, a corporation
organized and existing under the General Corporation Law of the State of
Delaware (the "Corporation"), DOES HEREBY CERTIFY:

         The amendment set forth below to the Corporation's Restated
Certificate of Incorporation, was duly adopted in accordance with the
provisions of Section 242 of the General Corporation Law of the State of
Delaware:

         Article NINTH is amended by the addition of a new Paragraph 6 to read
in its entirety:

         6. No director shall be personally liable to the corporation or its
stockholders for monetary damages for any breach of fiduciary duty by such
director as a director. Notwithstanding the foregoing sentence, a director
shall be liable to the extent provided by applicable law (i) for breach of the
director's duty of loyalty to the corporation or its stockholders, (ii) for
acts or omissions not in good faith or which involve intentional misconduct or
a knowing violation of law, (iii) pursuant to Section 174 of the Delaware
General Corporation Law or (iv) for any transaction from which the director
derived an improper personal benefit. No amendment to or repeal of this
paragraph shall apply to or have any effect on the liability or alleged
liability of any director of the corporation for or with respect to any acts or
omissions of such director occurring prior to such amendment or repeal.

         IN WITNESS WHEREOF, ELECTRONIC SPACE SYSTEMS CORPORATION has caused
this Certificate to be signed and attested by its duly authorized officers,
this 16th day of February, 1989.

                                       ELECTRONIC SPACE SYSTEMS CORPORATION

                                       By: /s/ Steven R. Scheff
                                           ---------------------------------
                                           President


ATTEST:


/s/ Charles R. Harking
- -------------------------------------
Secretary





                          CERTIFICATE OF AMENDMENT
                                     of the
                          CERTIFICATE OF INCORPORATION
                                       of
                      ELECTRONIC SPACE SYSTEMS CORPORATION

                    (Pursuant to Section 242 of the General
                   Corporation Law of the State of Delaware)

                     -------------------------------------

         The undersigned, desiring to amend the certificate of incorporation of
a Delaware corporation under the provisions of the General Corporation Law of
the State of Delaware (the "GCL"), hereby certifies as follows:

         1. The name of the corporation is: ELECTRONIC SPACE SYSTEMS
CORPORATION (the "Corporation").

         2. Article "FIRST" of the certificate of incorporation of the
Corporation is hereby amended to change the name of the Corporation from
"ELECTRONIC SPACE SYSTEMS CORPORATION" to "L-3 COMMUNICATIONS ESSCO, INC.",
said Article "FIRST" to read in its entirety as follows:

         "FIRST: The name of the corporation is: L-3 COMMUNICATIONS ESSCO, INC.
(the "Corporation").

         3. The amendment herein certified has been duly adopted in accordance
with Section 242 of the GCL.

         IN WITNESS WHEREOF, the Corporation has caused this certificate to be
signed in its name by its officer as of the 8th day of December, 1998.

                                      ELECTRONIC SPACE SYSTEMS CORPORATION

                                      By: /s/ Christopher C. Cambria
                                          ------------------------------------
                                          Christopher C. Cambria
                                          Vice President


                                      -1-