Exhibit 31.2


      I, Randall Blank, certify that:

      1.   I have reviewed this quarterly report on Form 10-Q of SEACOR Holdings
           Inc.;

      2.   Based on my knowledge, this report does not contain any untrue
           statement of a material fact or omit to state a material fact
           necessary to make the statements made, in light of the circumstances
           under which such statements were made, not misleading with respect to
           the period covered by this report;

      3.   Based on my knowledge, the financial statements, and other financial
           information included in this report, fairly present in all material
           respects the financial condition, results of operations and cash
           flows of the registrant as of, and for, the periods presented in this
           report;

      4.   The registrant's other certifying officer and I are responsible for
           establishing and maintaining disclosure controls and procedures (as
           defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the
           registrant and have:

           (a)      Designed such disclosure controls and procedures, or caused
                    such disclosure controls and procedures to be designed under
                    our supervision, to ensure that material information
                    relating to the registrant, including its consolidated
                    subsidiaries, is made known to us by others within those
                    entities, particularly during the period in which this
                    report is being prepared;

           (b)      Evaluated the effectiveness of the registrant's disclosure
                    controls and procedures and presented in this report our
                    conclusions about the effectiveness of the disclosure
                    controls and procedures as of the end of the period covered
                    by this report based on such evaluation; and

           (c)      Disclosed in this report any change in the registrant's
                    internal control over financial reporting that occurred
                    during the registrant's most recent fiscal quarter (the
                    registrant's fourth fiscal quarter in the case of an annual
                    report) that has materially affected, or is reasonably
                    likely to materially affect, the registrant's internal
                    control over financial reporting.

      5.   The registrant's other certifying officer and I have disclosed, based
           on our most recent evaluation of internal control over financial
           reporting, to the registrant's auditors and the audit committee of
           the registrant's board of directors (or persons performing the
           equivalent functions):

           (a)       All significant deficiencies and material weaknesses in the
                     design or operation of internal control over financial
                     reporting which are reasonably likely to adversely affect
                     the registrant's ability to record, process, summarize and
                     report financial information; and

           (b)       Any fraud, whether or not material, that involves
                     management or other employees who have a significant role
                     in the registrant's internal control over financial
                     reporting.

      Date: August 9, 2004

      /s/ Randall Blank
      -----------------------------------
      Name: Randall Blank
      Title: Chief Financial Officer