UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                              WASHINGTON, DC 20549


                                    FORM 8-K

                                 CURRENT REPORT

     Pursuant to Section 13 or 15 (d) of the Securities Exchange Act of 1934

      Date of Report (Date of earliest event reported): September 29, 2006


                                ESSEX CORPORATION
             (Exact name of Registrant as specified in its charter)

                           Commission File No. 0-10772

         Virginia                                                  54-0846569
(State or other jurisdiction of                         (IRS Employer ID No.)
incorporation or organization)

         6708 Alexander Bell Drive
         Columbia, Maryland                                        21046-2306
(Address of principal executive office)                            (Zip Code)

Registrant's telephone number, including area code:            (301) 939-7000

Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ] Written communications pursuant to Rule 425 under the Securities Act
    (17 CFR 230.425)

[ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act
    (17 CFR 240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
    Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
    Act (17 CFR 240.13e-4(c))





ITEM 1.01.   ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT.

         On  September  29,  2006 and on  October  1,  2006,  Essex  Corporation
("ESSEX" or the "CORPORATION"),  together with its subsidiaries,  entered into a
Second  Amendment  (the "SECOND  AMENDMENT")  and a Third  Amendment (the "THIRD
AMENDMENT" and collectively, the "AMENDMENTS"), respectively, to its Amended and
Restated Revolving Line of Credit Loan and Security Agreement,  dated as of June
30, 2005, as amended (the "LOAN AGREEMENT") with Bank of America, N.A. ("BANK OF
AMERICA"). The Amendments were entered into in connection with the completion of
Essex's  acquisition of Adaptive  Optics  Associates,  Inc.  ("AOA")  (described
below) and, among other items,  (i) increased  Essex's maximum  borrowing amount
under the Loan  Agreement's  revolving  credit  facility  to $55  million,  (ii)
adjusted certain financial  covenants,  fees and interest rate margins under the
Loan Agreement,  (iii) provided for Bank of America's consent to the acquisition
of AOA by Essex, and (iv) added AOA as a borrower under the Loan Agreement.

         The  foregoing  description  of the  Amendments  does not purport to be
complete and is  qualified in its entirety by reference to the Second  Amendment
and to the Third  Amendment,  which are filed as  EXHIBITS  1.1 and 1.2  hereto,
respectively, and incorporated herein by reference.

ITEM 2.01 COMPLETION OF ACQUISITION OR DISPOSITION OF ASSETS.

         On October 1, 2006, Essex completed the acquisition (the "ACQUISITION")
of all of the issued and outstanding capital stock of AOA from MTLG Investments,
Inc.  ("MTLG"),  a  wholly-owned  subsidiary  of  Metrologic  Instruments,  Inc.
("METROLOGIC").  Essex acquired all of the outstanding capital stock of AOA from
MTLG for an aggregate  consideration of approximately $40.3 million in cash (the
"PURCHASE  PRICE")  pursuant  to a  definitive  Stock  Purchase  Agreement  (the
"PURCHASE AGREEMENT"), dated September 19, 2006, among Metrologic, MTLG, AOA and
Essex.  Essex  has  issued a press  release  announcing  the  completion  of the
Acquisition,  which is filed as EXHIBIT 99.1 hereto and  incorporated  herein by
reference.

         The  Purchase  Price is  subject  to  post-closing  upward or  downward
adjustment  in the event AOA's  adjusted net working  capital (as defined in the
Purchase  Agreement)  as of  September  30,  2006  exceeds or is less than $5.65
million,  respectively.  In addition, if Essex chooses to make an election under
Section  338(h)(10)  of the  Internal  Revenue  Code to treat  the sale of AOA's
stock, for tax purposes,  as if the transaction were structured as a sale of all
of AOA's assets,  Essex has agreed to increase the Purchase  Price to the extent
necessary to cover any  increased  tax liability to MTLG as a result of such tax
election.

         The foregoing description of the Acquisition and the Purchase Agreement
does not purport to be complete and is qualified in its entirety by reference to
the Purchase  Agreement,  which is filed as EXHIBIT 2.1 hereto and  incorporated
herein by reference.

ITEM 2.03.   CREATION OF A DIRECT FINANCIAL OBLIGATION OR AN OBLIGATION UNDER AN
             OFF-BALANCE SHEET ARRANGEMENT OF A REGISTRANT.

         The  information  described  above  under Item 1.01 of this Form 8-K is
hereby incorporated by reference into this Item 2.03.



ITEM 9.01.   FINANCIAL STATEMENTS AND EXHIBITS.

(A)         FINANCIAL STATEMENTS OF BUSINESS ACQUIRED.

            The Corporation  hereby undertakes to file any financial  statements
required  by this Item  9.01(a)  not later than 71 days after the date this Form
8-K was due for filing.

(B)         PRO FORMA FINANCIAL INFORMATION.

            The  Corporation  hereby  undertakes to file any pro forma financial
information  required by this Item 9.01(b) not later than 71 days after the date
this Form 8-K was due for filing.

(D)    EXHIBITS

       Exhibit
       NUMBER  DESCRIPTION

       1.1     Second  Amendment to Amended and Restated Line of Credit Loan and
               Security  Agreement,  dated  September  29, 2006,  by and between
               Essex   Corporation,   The  Windermere  Group,  LLC,   Windermere
               Information  Technology  Systems,  LLC,  Windermere HDS, LLC, and
               Bank of America, N.A.

       1.2     Third  Amendment to Amended and Restated  Line of Credit Loan and
               Security   Agreement,   Joinder,   Assumption  and   Ratification
               Agreement, dated October 1, 2006, by and among Essex Corporation,
               The Windermere  Group,  LLC,  Windermere  Information  Technology
               Systems,  LLC,  Windermere HDS, LLC, Adaptive Optics  Associates,
               Inc., and Bank of America, N.A.

       2.1     Stock  Purchase  Agreement  by and among MTLG  Investments  Inc.,
               Metrologic  Instruments,  Inc., Adaptive Optics Associates,  Inc.
               and  Essex   Corporation,   dated  as  of  September   19,  2006.
               (incorporated  by reference to Essex's Current Report on Form 8-K
               filed on September 21, 2006).*

       99.1    Press Release of the Corporation dated October 2, 2006.

          -------------------
          *    The  registrant  has omitted  certain  schedules  and exhibits in
               accordance  with Item 601(b)(2) of Regulation S-K. The registrant
               will furnish the omitted schedules and exhibits to the Securities
               and Exchange Commission upon request.




                                   SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                           ESSEX CORPORATION


                           /S/ LISA G. JACOBSON
                           --------------------------------------------------
DATE:  October 4, 2006     Lisa G. Jacobson
                           Executive Vice President and Chief Financial Officer





                                  EXHIBIT INDEX
Exhibit
NUMBER    DESCRIPTION

1.1       Second  Amendment  to Amended  and  Restated  Line of Credit  Loan and
          Security  Agreement,  dated  September  29, 2006, by and between Essex
          Corporation,   The  Windermere  Group,  LLC,  Windermere   Information
          Technology  Systems,  LLC,  Windermere  HDS, LLC, and Bank of America,
          N.A.

1.2       Third  Amendment  to  Amended  and  Restated  Line of Credit  Loan and
          Security Agreement,  Joinder,  Assumption and Ratification  Agreement,
          dated October 1, 2006, by and among Essex Corporation,  The Windermere
          Group, LLC, Windermere Information Technology Systems, LLC, Windermere
          HDS, LLC, Adaptive Optics Associates, Inc., and Bank of America, N.A.

2.1       Stock  Purchase   Agreement  by  and  among  MTLG  Investments   Inc.,
          Metrologic  Instruments,  Inc.,  Adaptive Optics Associates,  Inc. and
          Essex  Corporation,  dated as of September 19, 2006  (incorporated  by
          reference to Essex's Current Report on Form 8-K filed on September 21,
          2006).*

99.1      Press Release of the Corporation dated October 2, 2006.

-------------------
*         The  registrant  has  omitted  certain   schedules  and  exhibits  in
          accordance with Item 601(b)(2) of Regulation S-K. The registrant will
          furnish the omitted  schedules  and  exhibits to the  Securities  and
          Exchange Commission upon request.