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EXHIBIT
15.1
INDEPENDENT
REGISTERED PUBLIC ACCOUNTING FIRM’S
ACKNOWLEDGEMENT
LETTER
October 30,
2009
To
the Board of Directors and Shareholders
of
Helix Energy Solutions Group, Inc.
We are aware of the
incorporation by reference in Registration Statement Forms S-3 (Nos. 333-157785,
333-103451 and 333-125276) and Forms S-8 (Nos. 333-126248, 333-58817, 333-50289
and 333-50205) of Helix Energy Solutions Group, Inc. of our report dated October
30, 2009 relating to the unaudited condensed consolidated interim financial
statements of Helix Energy Solutions Group, Inc. and subsidiaries that are
included in its Form 10-Q for the quarter ended September 30, 2009.
Very truly yours,
/s/ Ernst &
Young LLP
Houston, Texas