EXHIBIT 99.1

          ENVIRONMENTAL TECTONICS CORPORATION ANNOUNCES REDEMPTION OF
                                 LONG-TERM BONDS

Southampton, PA-August 2, 2005-Environmental Tectonics Corporation (AMEX-ETC)
("ETC" or the "Company") today announced it redeemed all of its outstanding
taxable variable rate demand/fixed rate revenue bonds due April 1, 2020 (the
"Bonds"). The Bonds were originally issued March 15, 2000 to fund the Company's
operations and to finance construction of an addition to the Company's main
plant in Southampton, PA. To fund the redemption of the Bonds, which
approximated $4.1 million in principal and accrued interest, the Company
utilized $4.1 million in restricted cash that had been held as collateral by PNC
Bank, National Association for the letter of credit, which secured the Bonds.

As of May 27, 2005, all deferred financing charges associated with the Bonds had
been fully amortized to the Company's profit and loss statement.

         ETC designs, develops, installs and maintains aircrew training systems,
public entertainment systems, process simulation systems (sterilization and
environmental), clinical hyperbaric systems, environmental testing and
simulation systems, and related products for domestic and international
customers.

         This press release may include forward-looking statements within the
meaning of Section 27A of the Securities Act of 1933 as amended, and Section 21E
of the Securities Exchange Act of 1934. We have based these forward-looking
statements on our current expectations and projections about future events.
These forward-looking statements are subject to known and unknown risks,
uncertainties and assumptions about the Company that may cause our actual
results, levels of activity, performance or achievements to be materially
different from any other future results, levels of activity, performance or
achievements expressed or implied by such forward-looking statements. In some
cases, you can identify forward-looking statements by terminology such as "may",
"will", "should', "could", "would", "expect", "plan", "anticipate", "believe",
"estimate", "continue", or the negative of such terms or similar expressions.
Factors that might cause or contribute to such a discrepancy include, but are
not limited to, contract cancellations, failure to obtain new contracts,
political unrest in customer countries, unfavorable results in litigation,
general economic conditions, and those issues identified from time to time in
our Securities and Exchange Commission filings and other public documents,
including, without limitation, our Annual Report on Form 10-K for the fiscal
year ended February 25, 2005.

Contact: Duane D. Deaner, CFO  TEL: 215-355-9100 (ext. 1203)  FAX: 215-357-4000
                  ETC - Internet Home Page: http://www.etcusa.com
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