EXHIBIT 99.1

                                                                   PRESS RELEASE


                   SEACOR HOLDINGS ANNOUNCES EXECUTIVE CHANGES


HOUSTON, TEXAS
September 7, 2005

FOR IMMEDIATE RELEASE -- SEACOR Holdings Inc. (NYSE:CKH) announced today that
Randall Blank, currently SEACOR's Executive Vice President, Chief Financial
Officer, and Secretary will assume full-time responsibility as President and CEO
of its environmental division, SEACOR Environmental Services Inc., ("SES") and
that Richard Ryan will assume the position of Chief Financial Officer for
SEACOR. Alice Gran, SEACOR's Senior Vice President and General Counsel, will
become Corporate Secretary.

Charles Fabrikant, Chairman and CEO of SEACOR remarked, "Ran and I have worked
together for the past 21 years and co-founded SEACOR in 1989. He has been
instrumental in every transaction that has made the Company what it has become
today. For the past three years Ran has also overseen the growth of our
environmental unit, primarily consisting of the National Response Corporation
and The O'Brien's Group, and has been the driving force in developing its
international presence. Our goal is to grow our environmental business more
aggressively. Ran has a wealth of experience in mergers and acquisitions, and is
the ideal leader to capitalize on SES' potential. We are also excited about the
prospects for Applied Process Technology, Inc., a SEACOR investment which
provides innovative, waste-free technologies for clean water. Fortunately we
have depth in management allowing us to fill Ran's shoes by bringing in a highly
qualified individual who has been with us almost 10 years and is familiar with
our culture. Richard Ryan also headed the transition team responsible for
integrating Seabulk and SEACOR."

Mr. Ryan started his career as a certified accountant in the UK Atomic Energy
Authority. He has 28 years experience in the offshore industry, and has worked
in Houston, Singapore, France and the United Kingdom. Mr. Ryan, who most
recently served as SEACOR Marine International's Chief Operating Officer, will
be succeeded in that role by Clyde Camburn, who has served as international
controller for the offshore marine group for the last three years.

In a related executive change, Matthew Cenac, currently SEACOR's Controller,
will become SEACOR's Chief Accounting Officer and will relocate to Fort
Lauderdale, Florida. Lenny Dantin, currently Vice President and Chief Accounting
Officer, will remain in the Company's Morgan City, Louisiana office and assist
with other financial matters.

SEACOR is a global provider of marine support and transportation service,
primarily to the energy and chemical industries. SEACOR and its subsidiaries
provide customers with a full suite of marine-related services including
offshore services, U.S. coastwise shipping, inland river services, helicopter
services, environmental services, and offshore and harbor towing services.
SEACOR is uniquely focused on providing highly responsive local service,
combined with the highest safety standards, innovative technology, modern
efficient equipment, and dedicated, professional employees.


This release includes "forward-looking statements" within the meaning of the
Private Securities Litigation Reform Act of 1995. Such forward-looking
statements concerning management's expectations, strategic objectives, business
prospects, anticipated economic performance and financial condition and other
similar matters involve known and unknown risks, uncertainties and other
important factors that could cause the actual results, performance or
achievements of results to differ materially from any future results,
performance or achievements discussed or implied by such forward-looking
statements. Such risks, uncertainties and other important factors include, among
others: the cyclical nature of the oil and gas industry, the operation of
Offshore Marine Services and Helicopter Services in a highly competitive
environment, changes in foreign political, military and economic conditions, the
dependence of Offshore Marine Services and Helicopter Services on several
customers, industry fleet capacity, the ongoing need to replace aging vessels,
restrictions imposed by the Shipping Acts and Aviation Acts on the amount of
foreign ownership of the Company's Common Stock, safety record requirements
related to Offshore Marine Services and Helicopter Services, changes in foreign
and domestic oil and gas exploration and production activity, vessel and
helicopter-related risks of Offshore Marine Services and Helicopter Services,
effects of adverse weather conditions and seasonality on Helicopter Services,
dependence of spill response revenue on the number and size of spills and upon
continuing government regulation in this area and our ability to comply with
such regulation and other governmental regulation, changes in NRC's OSRO
classification, effects of adverse weather and river conditions and seasonality
on inland river operations, the level of grain export volume, the effect of fuel
prices on barge towing costs, variability in freight rates for inland river
barges, liability in connection with providing spill response services, the
effect of international economic and political factors in inland river
operations, the intense competition faced by Inland River Services, adequacy of
insurance coverage, currency exchange fluctuations, the attraction and retention
of qualified personnel by the Company, and various other matters, many of which
are beyond the Company's control and other factors. The words "estimate,"
"project," "intend," "believe," "plan" "goal" and similar expressions are
intended to identify forward-looking statements. Forward-looking statements
speak only as of the date of the document in which they are made. We disclaim
any obligation or undertaking to provide any updates or revisions to any
forward-looking statement to reflect any change in our expectations or any
change in events, conditions or circumstances on which the forwardlooking
statement is based. The forward-looking statements in this release should be
evaluated together with the many uncertainties that affect our businesses,
particularly those mentioned under "Forward-Looking Statements" in Item 7 of our
Form 10-K and SEACOR's periodic reporting on Form 10-Q and Form 8-K (if any),
which we incorporate by reference.

For additional information, contact Timothy McKeand, Vice President, at (954)
524-4200 ext. 820 or visit SEACOR's website at www.seacorholdings.com.