Exhibit 99.1

          BWXT Amends $135 Million Revolving Credit Facility

    NEW ORLEANS--(BUSINESS WIRE)--March 24, 2005--BWX Technologies,
Inc. ("BWXT"), a subsidiary of McDermott International, Inc.
(NYSE:MDR) ("McDermott"), announced today that it and a group of
lenders have entered into the First Amendment to BWXT's Revolving
Credit Agreement. The amended credit facility provides BWXT committed
credit capacity of $135 million, which can later be increased to $150
million. The First Amendment extends the maturity date of the
Revolving Credit Agreement to March 18, 2010, reduces the annual
commitment fee on the facility to 37.5 basis points and modifies
certain covenants including increasing permitted acquisitions to $75
million over a twelve-month period and increasing allowable unsecured
debt to $20 million. Calyon, New York Branch (formerly Credit
Lyonnais, New York Branch) served as administrative agent on the First
Amendment.
    "I appreciate the commitment and confidence our lenders are
showing to BWXT," said John Fees, president and chief operating
officer of BWXT. "The amended facility provides BWXT with the
long-term credit capacity it needs with pricing and terms that reflect
our strong financial performance."
    BWXT, headquartered in Lynchburg, Va., supplies nuclear operations
services and products to the U.S. government and commercial clients.
The Company manages complex production facilities and advanced energy
products. Among its diverse capabilities are decontamination and
decommissioning, waste management, engineering, and project management
services.
    McDermott International, Inc. is a leading worldwide energy
services company. The Company's subsidiaries provide engineering,
fabrication, installation, procurement, research, manufacturing,
environmental systems, project management and facility management
services to a variety of customers in the energy and power industries,
including the U.S. Department of Energy. Additional information on
McDermott can be obtained at www.mcdermott.com.

    In accordance with the Safe Harbor provisions of the Private
Securities Litigation Reform Act of 1995, McDermott International,
Inc. cautions that statements in this press release which are
forward-looking and provide other than historical information involve
risks and uncertainties that may impact McDermott's actual results of
operations. The forward-looking statements in this press release
include, among other things, statements about BWXT's long-term credit
capacity. Although McDermott's management believes that the
expectations reflected in those forward-looking statements are
reasonable, McDermott can give no assurance that those expectations
will prove to have been correct. Those statements are made based on
various underlying assumptions and are subject to numerous
uncertainties and risks, including, without limitation, fluctuations
in BWXT's liquidity position and credit requirements. If one or more
of these risks materialize, or if underlying assumptions prove
incorrect, actual results may vary materially from those expected. For
a more complete discussion of these risk factors, please see
McDermott's annual report for the year ended Dec. 31, 2003 and its
2004 quarterly reports filed with the Securities and Exchange
Commission.

    CONTACT: McDermott International, Inc., Houston
             Jay Roueche, 281-870-5462
             jroueche@mcdermott.com
             www.mcdermott.com