EXHIBIT 99.1


SEACOR Announces Increase in Securities Repurchase Authority
Wednesday February 22, 7:14 pm ET

FORT LAUDERDALE, Fla., Feb. 22 /PRNewswire-FirstCall/ -- SEACOR Holdings Inc.
(NYSE: CKH - News) announced today that its Board of Directors has increased its
authorization for repurchases pursuant to its previously announced securities
repurchase program. With this increase, SEACOR has approximately $50 million
available for such purchases. The securities covered by the repurchase program
include Seacor's common stock, its 7.2% senior notes due 2009, its 5 7/8% senior
notes due 2012, its 2.875% convertible senior debentures due 2024, and the 9
1/2% senior notes due 2013 of Seabulk International, Inc., a wholly-owned
subsidiary. The repurchase of securities may be conducted from time to time
through open market purchases, privately negotiated transactions or otherwise
depending on market conditions.

SEACOR is a global provider of marine support and transportation services,
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 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 each
of our business units in a highly competitive environment, changes in foreign
political, military and economic conditions, the dependence of each business
unit 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, modification or
elimination of the Jones Act, risks associated with oil spills, changes in
environmental laws and regulations that would increase competition for Marine
Transportation Services provided by our modern double- hull fleet, safety record
requirements imposed by customers, changes in foreign and domestic oil and gas
exploration, production and refining activity, vessel and helicopter-related
operational risks, effects of adverse weather conditions on all business units
and of seasonality on Helicopter and Inland River Services, dependence of spill
response revenue on the number and size of spills and upon continuing government
environmental laws and regulations and our ability to comply with such laws and
regulations and other governmental laws and regulations, changes in National
Response Corporation's "Oil Spill Response Organization" classification,
liability in connection with providing spill response services, effects of
adverse river conditions on Inland River Services, the level of grain export
volume, the effect of fuel prices on barge towing costs, variability in freight
rates for inland river barges, 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 as described at the end of Item 7 (Management's
Discussion and Analysis of Financial Condition and Results of Operations) of the
Company's Form 10-K for the fiscal year ended December 31, 2004. The words
"expect," "anticipate," "estimate," "project," "intend," "believe," "plan" 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
forward-looking statement is based.