DOCUMENT TYPE SC 13G/A
TEXT


SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934

Amendment # 6

Name of Issuer: MCDERMOTT INTERNATIONAL INC
_____________________________________________________
Title of Class
of Securities: Common Stock

CUSIP Number: 580037109

1) NAME OF I.R.S. IDENTIFICATION NO. OF REPORTING PERSON

The Prudential Insurance Company of America 22-1211670

2.) MEMBER OF A GROUP: (a) N/A
(b) N/A

3) SEC USE ONLY:



4) PLACE OF ORGANIZATION: A mutual insurance company organized
under the laws of the State of New Jersey

NUMBER OF SHARES BENEFICIALLY OWNED BY REPORTING PERSON WITH:

5) Sole Voting Power: 72,100 See Exhibit A
6) Shared Voting Power: 5,324,462 See Exhibit A
7) Sole Dispositive Power: 72,100 See Exhibit A
8) Shared Dispositive Power: 5,344,834 See Exhibit A

9) AGGREGATE AMOUNT BENEFICIALLY OWNED:
5,416,934 See Exhibit A

10) AGGREGATE AMOUNT IN ROW (9) EXCLUDES SHARES: Not Applicable

11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9):
8.96 See Exhibit A

12) TYPE OF REPORTING PERSON: IC, IA

ITEM 1(a). NAME OF ISSUER:

MCDERMOTT INTERNATIONAL INC

ITEM 1(b). ADDRESS OF ISSUER'S EXECUTIVE OFFICES:

MCDERMOTT INTERNATIONAL INC 1450 Poydras St New Orleans, LA 70112-6050

ITEM 2(a). NAME OF PERSON FILING:

The Prudential Insurance Company of America

ITEM 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE:

751 Broad Street
Newark, New Jersey 07102-3777

ITEM 2(c). CITIZENSHIP:

A mutual insurance company organized under the laws of
the State of New Jersey

ITEM 2(d). TITLE OF CLASS OF SECURITIES:

Common Stock

ITEM 2(e). CUSIP NUMBER:

580037109

ITEM 3. The Person filing this statement is an Insurance Company
as defined in Section 3(a) (19) of the Securities Exchange
Act of 1934, and an Investment Adviser registered under
Section 203 of the Investment Advisers Act of 1940.

ITEM 4. OWNERSHIP:

(a) Number of Shares
Beneficially Owned: 5,416,934 See Exhibit A

(b) Percent of Class: 8.96

Number
(c) Powers Of Shares
------------------------------------- - -------------------------------------
Sole power to vote or 72,100 See Exhibit A
to direct the vote

Shared power to vote or 5,324,462 See Exhibit A
to direct the vote

Sole power to dispose or 72,100 See Exhibit A
to direct disposition

Shared power to dispose 5,344,834 See Exhibit A
or to direct disposition

ITEM 5. OWNERSHIP OF 5% OR LESS OF A CLASS:

Not Applicable

ITEM 6. OWNERSHIP OF MORE THAN 5% ON BEHALF OF
ANOTHER PERSON:

See Exhibit A

ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE
SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING
REPORTED ON BY THE ULTIMATE PARENT COMPANY:

Not Applicable

ITEM 8. IDENTIFICATION AND CLASSIFICATION OF
MEMBERS OF THE GROUP:

Not Applicable

ITEM 9. NOTICE OF DISSOLUTION OF GROUP:

Not Applicable

ITEM 10. CERTIFICATION:

By signing below, the Prudential Insurance Company of America
certifies that, to the best of its knowledge and belief, the
securities referred to above were acquired in the ordinary course
of business and were not acquired for the purpose of and do not
have the effect of changing or influencing the control of the
issuer of such securities and were not acquired in connection
with or as a participant in any transaction having such purpose
or effect.

The filing of this statement should not be construed as an admission that
Prudential is, for purposes of Sections 13 or 16 of the Securities
Exchange Act of 1934, the beneficial owner of such shares.



SIGNATURE

After reasonable inquiry and to the best of its knowledge and
belief, The Prudential Insurance Company of America certifies that
the information set forth in this statement is true, complete and
correct.


THE PRUDENTIAL INSURANCE COMPANY OF AMERICA

By: Ellen McGlynn Koke
Vice President

Date: 02/12/2001
As of: 12/31/2000

Exhibit A
--------------

ITEM 6. OWNERSHIP:

The Prudential Insurance Company of America ('Prudential') presently holds 500 shares of Issuer's common stock for the benefit of its general account. In addition, Prudential may have direct or indirect voting and/or investment discretion over 5,416,434 shares which are held for it's own benefit or for the benefit of its clients by its separate accounts, externally managed accounts, registered investment companies, subsidiaries and/or other affiliates. Prudential is reporting the combined holdings of these entities for the purpose of administrative convenience. These shares were acquired in the ordinary course of business, and not with the purpose or effect of changing or influencing control of the Issuer. The filing of this statement should not be construed as an admission that Prudential is, for the purposes of Sections 13 or 16 of the Securities Exchange Act of 1934, the beneficial owner of these shares.