Seacor (CKH) 10-Q 2010 Q2 Quarterly report

Exhibit 32.2

CERTIFICATION

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED BY SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Richard Ryan, as Chief Financial Officer of SEACOR Holdings Inc. (the “Company”), certify, pursuant to 18 U.S.C. § 1350, as adopted by Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

(1) the accompanying Quarterly Report on Form 10-Q for the period ending June 30, 2010 as filed with the U.S. Securities and Exchange Commission (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: July 29, 2010

/s/ RICHARD RYAN

Richard Ryan

Senior Vice President and

Chief Financial Officer