Exhibit 21.1

McDERMOTT INTERNATIONAL, INC.

SIGNIFICANT SUBSIDIARIES OF THE REGISTRANT

YEAR ENDED DECEMBER 31, 2014

McDermott International Management, S. de RL.	Panama
McDermott International Investments Co., Inc.	Panama
McDermott International Trading Co., Inc.	Panama
McDermott Marine Construction Limited	United Kingdom
J. Ray McDermott, S.A.	Panama
North Atlantic Vessel,  Inc.	Panama
J. Ray McDermott (Aust.) Holding Pty Limited	Australia
McDermott Australia Pty. Ltd.	Australia
Hydro Marine Services, Inc.	Panama
Eastern Marine Services, Inc.	Panama
McDermott Asia Pacific Pte. Ltd.	Singapore
P.T. McDermott Indonesia	Indonesia
McDermott Caspian Contractors,  Inc.	Panama
J. Ray McDermott International, Inc.	Panama
McDermott Middle East, Inc.	Panama
J. Ray McDermott Far East, Inc.	Panama
J. Ray McDermott Underwater Services, Inc.	Panama
J. Ray McDermott de Mexico, S.A. de C.V.	Mexico
McDermott Arabia Holdings, Inc.	Panama
McDermott Arabia Company Limited	Saudi Arabia
Berlian McDermott Sdn. Bhd.	Malaysia
J. Ray McDermott (Luxembourg) S.ar.l.	Luxembourg
J. Ray Holdings, Inc.	Delaware
J. Ray McDermott Holdings, LLC	Delaware
McDermott, Inc.	Delaware

The subsidiaries omitted from the foregoing list, considered in the aggregate as a single subsidiary, do not constitute a significant subsidiary.