Exhibit 21

BRISTOW GROUP INC.

Subsidiaries as of March 31, 2013

Company	Place of Incorporation	Percentage of Stock  Owned
ALN, Inc.	Delaware		100	%
Atyrau-Bristow Airways Service	Kazakhstan		49	%*
Aviashelf Aviation Co.	Russia		48.5	%*
BL Scotia LP	Scotland		100	%
BL Holdings B.V.	Netherlands		100	%
BL Holdings II C.V.	Netherlands		100	%
BL US Holdings LLC	Delaware		100	%
BGI Aviation Services UK LP	England		100	%
BGI Aviation Technical Nigeria Services Limited.	Nigeria		100	%*
BGI Aviation Technical Services (Overseas) Limited.	England		100	%*
BHNA Holdings Inc.	Delaware		100	%
BriLog Leasing Limited	Cayman Islands		100	%**
Bristow Alaska, Inc.	Alaska		100	%
Bristow Academy Inc.	California		100	%
Bristow Academy (UK) Limited.	England		100	%*
Bristow Aviation Holdings Limited	England		49	%
Bristow Canada Holdings Inc.	British Columbia		100	%
Bristow Canadian Real Estate Company Inc.	British Columbia		100	%
Bristow Caribbean Limited.	Trinidad/Tobago		100	%*
Bristow Cayman Ltd.	Cayman Islands		100	%**
Bristow Helicopter Group Limited	England		100	%**
Bristow Helicopters (Ghana) Limited	Ghana		100	%*
Bristow Helicopters (International) Limited	England		100	%*
Bristow Helicopters (Netherlands) BV	Netherlands		100	%*
Bristow Helicopters (Nigeria) Limited	Nigeria		40	%*
Bristow Helicopters Australia Pty. Limited	Australia		100	%*
Bristow Helicopters Inc.	Delaware		100	%
Bristow Helicopters Leasing Limited	England		60	%*
Bristow Helicopters Limited	England		100	%*
Bristow Helikopters BV	Netherlands		100	%*
Bristow International Aviation (Guernsey) Limited	Guernsey		100	%*
Bristow International Panama, Inc.	Panama		100	%
Bristow Management Services Pty Limited	Australia		100	%*
Bristow Norway AS	Norway		100	%*
Bristow Panama Inc.	Panama		100	%
Bristow Southeast Asia Limited	England		100	%*
Bristow Staff Pension Scheme Trustees Limited	England		100	%*
Bristow Technical Services Limited	England		100	%*
Bristow (UK) LLP	England		100	%
Bristow U.S. LLC	Louisiana		100	%
Bristow Worldwide LP	England		***
Caledonian Helicopters Limited	England		100	%*
Cougar Helicopters Inc.	Canada		40	%
FB Heliservices Limited	England		50	%*
FB Helitour OY	Finland		33	%*
FB Leasing Limited	England		50	%*
FBS Limited	England		50	%*
Helideck Certification Agency Limited	Scotland		50	%*
Kingsmill Insurance Company Limited	Guernsey		100	%*
Lider Taxi Aereo S.A.	Brazil		42.5	%
Offshore Logistics do Brasil Servicos Industrials E Maritimos Limitado	Brazil		100	%

Pan African Airlines (Nigeria) Limited.	Nigeria	49	%
Petroleum Air Services	Egypt	25	%
Rotorwing Leasing Resources, LLC.	Louisiana	100	%
Sakhalin Bristow Air Services Limited	England	60	%*
Severn Aviation Limited.	England	100	%*
Turkmenistan Helicopters Limited	Turkmenistan	51	%*
United Helicopters Limited	England	100	%*

* Percentage owned by Bristow Helicopter Group Limited or its subsidiaries

** Percentage owned by Bristow Worldwide LP

*** Bristow Worldwide LP is a partnership between Bristow (UK) LLP and Bristow Aviation Holdings Limited. Under the Partnership Agreement 95.88% of the profits and losses of BriLog Leasing Limited and Bristow Cayman Ltd. and 5% of the profits and losses of Bristow Helicopter Group Limited. and its subsidiaries are allocated to Bristow (UK) LLP. The remaining 4.12% of the profits and losses of BriLog Leasing Limited and Bristow Cayman Ltd. and 95% of the profits and losses of Bristow Helicopter Group Limited. and its subsidiaries are allocated to Bristow Aviation Holdings Limited.