Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Lima Marcelo G
 2. Date of Event Requiring Statement (Month/Day/Year)
11/14/2005		 3. Issuer Name and Ticker or Trading Symbol
MERCURY COMPUTER SYSTEMS INC [MRCY]
(Last)
(First)
(Middle)
199 RIVERNECK ROAD		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
_____ Officer (give title below) __X__ Other (specify below)
VP & GM Comm Imaging & Vis
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

CHELMSFORD, MA 01824		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 5,885 (1)
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
NQ Stock Option (Right to buy)   (2) 04/15/2013 Common Stock 7,500 $ 26.6 D  
NQ Stock Option (Right to buy)   (3) 07/28/2013 Common Stock 4,500 $ 19.03 D  
NQ Stock Option (Right to buy)   (4) 07/28/2014 Common Stock 15,000 $ 23.46 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Lima Marcelo G
199 RIVERNECK ROAD
CHELMSFORD, MA 01824		       VP & GM Comm Imaging & Vis

Signatures

Craig Barrows, Attorney-in-fact 05/02/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Includes 4,500 shares of restricted stock which vest in full on August 12, 2009 and 1,332 shares of restricted stock which vest in four annual installments commencing on August 12, 2006.
(2) This option vests in four equal installments beginning April 15, 2004.
(3) This option vests in four equal installments beginning July 28, 2004.
(4) This option vests in four equal installments beginning July 28, 2005.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

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