EXHIBIT 99.1


               ENVIRONMENTAL TECTONICS CORPORATION
                     1998 STOCK OPTION PLAN
  PAGE 1

                        TABLE OF CONTENTS


                                                            PAGE


ARTICLE 1.  PURPOSE OF THE PLAN; TYPE OF OPTIONS...........  1

ARTICLE 2.  DEFINITIONS....................................  1

ARTICLE 3.  ADMINISTRATION OF THE PLAN.....................  2

ARTICLE 4.  COMMON STOCK SUBJECT TO THE PLAN...............  4

ARTICLE 5.  STOCK OPTIONS..................................  4

ARTICLE 6.  ELIGIBILITY....................................  6

ARTICLE 7.  TERM, VESTING AND EXERCISE OF OPTIONS..........  6

ARTICLE 8.  TERMINATION OF EMPLOYMENT......................  8

ARTICLE 9.  ADJUSTMENT PROVISIONS..........................  9

ARTICLE 10.  GENERAL PROVISIONS............................  10

  PAGE 2

ARTICLE 1.  PURPOSE OF THE PLAN; TYPE OF OPTIONS

     1.1  Purpose.  The Environmental Tectonics Corporation 1998
Stock Option Plan is intended to provide selected Employees of
Environmental Tectonics Corporation and its Subsidiaries an
opportunity to acquire Common Stock of the Corporation.  The Plan
is designed to help the Corporation attract, retain and motivate
talented employees and to induce selected individuals to make
substantial contributions to the success of its business.

     1.2  Stock Options to be Granted.  Incentive Stock Options and
Nonqualified Stock Options may be granted within the limitations of
the Plan herein described.

ARTICLE 2.  DEFINITIONS

     2.1  "Agreement" means the written instrument evidencing the
grant of an Option.  A Participant may be issued one or more
Agreements from time to time, reflecting one or more Options.

     2.2  "Board" means the Board of Directors of the Corporation.

     2.3  "Cause" means that an Optionee (i) is convicted of, or
enters a plea of nolo contendere to, (A) a felony or (B) a crime of
fraud or other dishonesty with respect to the Corporation, a
Subsidiary, or any successor to either, or (ii) wilfully fails to
follow the lawful instructions of the Board after the Optionee's
receipt of written notice of such instructions, other than a
failure resulting from the Optionee's incapacity because of
physical or mental illness.

     2.4  "Code" means the Internal Revenue Code of 1986, as
amended and as the same may hereafter be amended, and the
regulations promulgated thereunder.

     2.5  "Committee" means the Committee which the Board appoints
to administer the Plan in accordance with the provisions of Section
3.1.

     2.6  "Common Stock" means the common stock of the Corporation
($0.10 par value) as described in the Corporation's Articles of
Incorporation, or such other stock as shall be substituted
therefor.

     2.7  "Corporation" means Environmental Tectonics Corporation,
a Pennsylvania corporation.

     2.8  "Effective Date" means the date specified in
Section 10.1.

     2.9  "Employee" means any common law employee of the
Corporation or a Subsidiary who is considered to be a "key
employee" and regularly works on a substantially full-time basis, 
<PAGE 1> as determined by the Committee from time to time.

     2.10  "Exchange Act" means the Securities Exchange Act of
1934, as amended and as the same may hereafter be amended, and the
regulations promulgated thereunder.

     2.11  "Exercise Price" means the price per share applicable to
an Option, as determined pursuant to Section 5.1.

     2.12  "Incentive Stock Option" means a Stock Option intended
to satisfy the requirements of Code Section 422(b).

     2.13  "Nonqualified Stock Option" means a Stock Option other
than an Incentive Stock Option.

     2.14  "Optionee" means a Participant who is awarded a Stock
Option pursuant to the provisions of the Plan.  Such term also
includes any person holding an Option as a permitted successor or
transferee of such a Participant.

     2.15  "Participant" means an Employee selected by the
Committee to receive a grant of an Option under the Plan.

     2.16  "Plan" means the Environmental Tectonics Corporation
1998 Stock Option Plan.

     2.17  "Retirement" means termination of employment upon or
following the attainment of age 65.

     2.18  "Securities Act" means the Securities Act of 1933, as
amended and as the same may hereafter be amended, and the
regulations promulgated thereunder.

     2.19  "Stock Option" or "Option" means an award of a right to
purchase Common Stock pursuant to the provisions of the Plan.

     2.20  "Subsidiary" means a "subsidiary corporation," as
defined in Code Section 424(f), that is a subsidiary of the
Corporation or, as the context requires, another corporation.

ARTICLE 3.  ADMINISTRATION OF THE PLAN

     3.1  The Committee.  The Plan shall be administered by a
committee of the Board composed of two or more members all of whom
are (i) "non-employee directors," as such term is defined under the
rules and regulations adopted from time to time by the Securities
and Exchange Commission pursuant to Section 16(b) of the Exchange
Act, and (ii) "outside directors," within the meaning of Code
Section 162(m).  The Board may from time to time remove members
from, or add members to, the Committee.  Vacancies on the
Committee, howsoever caused, shall be filled by the Board.
  <PAGE 2>
     3.2  Powers of the Committee.

          (a)  The Committee shall be vested with full authority to
     make such rules and regulations as it deems necessary or
     desirable to administer the Plan and to interpret the
     provisions of the Plan, unless otherwise determined by a
     majority of the disinterested members of the Board. Any
     determination, decision or action of the Committee in
     connection with the construction, interpretation,
     administration or application of the Plan shall be final,
     conclusive and binding upon all Optionees and any person
     claiming under or through an Optionee, unless otherwise
     determined by a majority of the disinterested members of the
     Board.

          (b)  Subject to the terms, provisions and conditions of
     the Plan and subject to ratification by a majority of the
     disinterested members of the Board, the Committee shall have
     exclusive jurisdiction to:

               (i)  determine and select, based upon the
          recommendation of the Corporation's Chief Executive
          Officer (except as to himself), the Employees to be
          granted Options (it being understood that more than one
          Option may be granted to the same person);

               (ii)  determine the number of shares of Common Stock
          subject to each Option;

               (iii)  determine the date or dates when the Options
          will be granted, which dates shall not be earlier than
          the date of Board ratification;

               (iv)  determine the Exercise Price of the shares
          subject to each Option;

               (v)  determine the date or dates when each Option
          may be exercised within the term of the Option specified
          pursuant to Article 7;

               (vi)  determine whether or not an Option constitutes
          an Incentive Stock Option; and

               (vii)  prescribe the form, which shall be consistent
          with this Plan document, of the Agreement evidencing any
          Options granted under the Plan.

     3.3  Terms.  The grant of an Option under the Plan shall be
evidenced by an Agreement and may include any terms and conditions
that are not inconsistent with this Plan document, as the Committee
may determine.
  <PAGE 3>
     3.4  Liability.  No member of the Board or the Committee shall
be liable for any action or determination made in good faith by the
Board or the Committee with respect to the Plan or any Options
granted under the Plan.

ARTICLE 4.  COMMON STOCK SUBJECT TO THE PLAN

     4.1  Common Stock Authorized.  The aggregate number of shares
of Common Stock for which Options may be granted under the Plan
shall not exceed 500,000 shares.  The limitation established by the
preceding sentence shall be subject to adjustment as provided in
Article 9.

     4.2  Shares Available.  The capital stock to be issued upon
exercise of Options granted under the Plan shall be the
Corporation's Common Stock which shall be made available, at the
discretion of the Board, either from authorized but unissued Common
Stock or from Common Stock acquired by the Corporation.  In the
event that any outstanding Option under the Plan for any reason
expires or is terminated, the shares of Common Stock allocable to
the unexercised portion of such Option may thereafter be made
subject to another Option.

ARTICLE 5.  STOCK OPTIONS

     5.1  Exercise Price.  The Exercise Price of a Stock Option
shall be, in the case of an Incentive Stock Option, 100 percent of
the fair market value of one share of Common Stock on the date the
Option is granted, except that the Exercise Price shall be 110
percent of such fair market value in the case of an Incentive Stock
Option granted to any individual described in Section 6.2. The
Exercise Price of a Stock Option shall be, in the case of a
Nonqualified Stock Option, not less than 100 percent of the fair
market value of one share of Common Stock on the date the Option is
granted.  The Exercise Price of an Option shall be subject to
adjustment only as provided in Article 9.

     5.2  Limitation on Incentive Stock Options.  The aggregate
fair market value (determined as of the date an Option is granted)
of the Common Stock with respect to which Incentive Stock Options
are exercisable for the first time by any individual in any
calendar year (under the Plan and all other plans maintained by the
Corporation and its Subsidiaries) shall not exceed $100,000.

     5.3  Determination of Fair Market Value.

          (a)  During such time as Common Stock is not listed on an
     established stock exchange or exchanges but is listed on the
     NASDAQ National Market System, the fair market value per share
     shall be the closing sale price for a share of the Common
     Stock on the day the Option is granted.  If no sale of Common
     Stock occurs on that day, the fair market value shall be 
     <PAGE 4> determined by reference to such price for the next
     preceding day on which a sale occurred.

          (b)  During such time as the Common Stock is not listed
     on an established stock exchange or on the NASDAQ National
     Market System, the fair market value per share shall be the
     mean between the closing dealer "bid" and "asked" prices for
     a share of the Common Stock on the day the Option is granted. 
     If no "bid" and "asked" prices are quoted for the day of the
     grant, the fair market value shall be determined by reference
     to such prices on the next preceding day on which such prices
     were quoted.

          (c)  If the Common Stock is listed on an established
     stock exchange or exchanges, the fair market value shall be
     the composite closing price of a share of the Common Stock on
     such stock exchange or exchanges on the day the Option is
     granted.  If no sale of Common Stock occurs on that day, the
     fair market value shall be determined by reference to such
     price for the next preceding day on which a sale occurred.

          (d)  In the event that the Common Stock is not listed on
     an established stock exchange or traded on the NASDAQ National
     Market System, and no closing dealer "bid" and "asked" prices
     are available on the date of a grant, then fair market value
     shall be the price established by the Committee in good faith.

     5.4  Limitation on Grants.  Grants to any Employee under the
Plan shall not exceed, in the aggregate, Options to purchase more
than 100,000 shares of Common Stock during any period of 12
consecutive months.  Such limitation shall be subject to adjustment
in the manner described in Article 9.

     5.5  Transferability of Options.  Unless otherwise designated
by the Committee to the contrary, each Option granted under the
Plan shall by its terms be nontransferable by the Optionee (except
by will or the laws of descent and distribution), and each Option
shall be exercisable during the Optionee's lifetime only by the
Optionee, his guardian or his legal representative, or by such
other means as the Committee may approve from time to time that is
not inconsistent with or contrary to the provisions of applicable
law.

     5.6  Beneficiary Designation.  An Optionee may, from time to
time, designate in writing a beneficiary to exercise his Stock
Option(s) after the Optionee's death.  Any change in such
beneficiary designation shall not become effective unless it is
executed by the Optionee and filed with the Secretary of the
Corporation prior to his death.
  <PAGE 5>
ARTICLE 6.  ELIGIBILITY

     6.1  Participation.  Options shall be granted only to persons
who are Employees, as determined by the Committee, based upon the
recommendation of the Chief Executive Officer (except as to
himself) and ratified by a majority of the disinterested members of
the Board.

     6.2  Incentive Stock Option Eligibility Restrictions. 
Notwithstanding any other provision of the Plan, an individual who
owns more than 10 percent of the total combined voting power of all
classes of outstanding stock of the Corporation shall not be
eligible for the grant of an Incentive Stock Option, unless the
special requirements set forth in Sections 5.1 and 7.1 of the Plan
are satisfied.  For purposes of this section, in determining stock
ownership, an individual shall be considered as owning the stock
owned, directly or indirectly, by or for his brothers and sisters
(whether by the whole or half blood), spouse, ancestors and lineal
descendants.  Stock owned, directly or indirectly, by or for a
corporation, partnership, estate or trust shall be considered as
being owned proportionately by or for its shareholders, partners or
beneficiaries.  "Outstanding stock" shall include all stock
actually issued and outstanding immediately before the grant of the
Option.  "Outstanding stock" shall not include shares authorized
for issue under outstanding Options held by the Optionee or by any
other person.

ARTICLE 7.  TERM, VESTING AND EXERCISE OF OPTIONS

     7.1  Term and Vesting.
          
          (a)  Each Option granted under the Plan shall terminate
     on the date determined by the Committee, approved by a
     majority of the disinterested members of the Board and
     specified in the relevant Agreement; provided, however, that
     (i) each intended Incentive Stock Option granted to an
     individual described in Section 6.2 of the Plan shall
     terminate not later than five years after the date of the
     grant, (ii) each other intended Incentive Stock Option shall
     terminate not later than ten years after the date of grant,
     and (iii) each Option granted under the Plan which is intended
     to be a Nonqualified Stock Option shall terminate not later
     than ten years and one month after the date of grant.  Each
     Option granted under the Plan shall be exercisable and shall
     be subject to forfeiture in accordance with the provisions
     determined by the Committee in connection with the grant and
     set forth in the relevant Agreement.  An Option may be
     exercised only during the continuance of the Optionee's
     employment, except as provided in Article 8.

          (b)  In the event the Agreement issued to an Optionee
     fails to specify a vesting schedule with respect to the 
     <PAGE 6> exercisability of the Option granted thereby, such
     schedule shall be as follows:

           Continuous Employment                            
           With Corporation and/                      
          or Subsidiary Following         Percentage of Option    
              Date of Grant                   Exercisable     

          Less than 1 year                           0
          At least 1 year, but 
           less than 2 years                        25
          At least 2 years, but
           less than 3 years                        50
          At least 3 years, but
           less than 4 years                        75
          At least 4 years                         100

     For purposes of this vesting schedule and any vesting schedule
     described or set forth in an Agreement, continuous employment
     shall be deemed to have terminated if an Optionee ceases to
     work on a substantially full-time basis, as determined from
     time to time by the Committee.  The Committee may, subject to
     such conditions as it may specify, treat approved temporary
     leaves of absence as not constituting a termination of
     employment for Plan purposes.

          (c)  Notwithstanding any vesting provision herein or in
     an Agreement to the contrary, an Optionee shall be deemed 100%
     vested in all of his Options upon termination of employment
     under a circumstance described in Section 8.1 or 8.2. 

     7.2  Exercise.

          (a)  A person electing to exercise an Option shall give
     written notice to the Corporation of such election and of the
     number of shares of Common Stock he has elected to purchase,
     in such form as the Committee shall have prescribed or
     approved, and shall at the time of exercise tender, in cash,
     the full Exercise Price of the shares to be purchased.

          (b)  A person holding more than one Option at any
     relevant time may elect to exercise such Options in any order.

          (c)  At the request of a Participant and to the extent
     permitted by applicable law, the Corporation may, in its sole
     discretion, selectively approve arrangements with a brokerage
     firm under which such brokerage firm, on behalf of the
     Participant, shall pay to the Corporation the Exercise Price
     of the Stock Option being exercised (and any required
     withholding taxes), and the Corporation, pursuant to an
     irrevocable notice from the Participant, shall promptly
     deliver the shares being purchased to such firm.  <PAGE 7>

     7.3  Forfeiture for Cause.  If an event of Cause occurs with
respect to an Optionee, all unexercised Options (vested and
nonvested) held by him (or any person claiming under or through
him) shall be forfeited immediately.


ARTICLE 8.  TERMINATION OF EMPLOYMENT

     8.1  Retirement.  Except as otherwise provided in Section 8.5,
in the event of an Optionee's Retirement, his Options shall lapse
at the earlier of (i) the expiration of the Options' respective
terms, or (ii) (A) in the case of an Incentive Stock Option, three
months following the date of Retirement, and (B) in the case of a
Nonqualified Stock Option, at the discretion of the Committee and
as specified in the relevant Agreement, up to 24 months following
the date of Retirement.

     8.2  Death or Disability.  In the event of an Optionee's
termination of employment due to death or "disability," as defined
in Code Section 72(m)(7), his Options may be exercised shall lapse
at the earlier of (i) the expiration of each Option's respective
term, or (ii) six months after termination due to such cause.

     8.3  Other Termination.  Except as otherwise provided in
Section 8.4, in the event of termination of an Optionee's
employment for any reason other than is described in Section 8.1 or
8.2, all Options (vested and unvested) shall lapse as of the date
of termination.

     8.4  Special Termination Provisions.

          
          (a)  Notwithstanding anything herein to the contrary, the
     Committee may, in its discretion and subject to the approval
     of a majority of the disinterested members of the Board, waive
     any vesting provisions applicable to an Option held by a
     terminated Optionee who has not satisfied the same prior to
     termination.  Any such waiver may be made with retroactive
     effect, provided it is made within 60 days following the
     Optionee's termination of employment.

          (b)  Notwithstanding anything herein to the contrary, the
     Committee may, in its discretion and subject to the approval
     of a majority of the disinterested members of the Board, waive
     the lapse provisions otherwise applicable to a vested Option
     and permit the exercise thereof until a date which is no later
     than the earlier of (i) the expiration of the term of such
     Option, or (ii) one year following the date of termination of
     the Optionee's employment.  

     8.5  Transfer of Employee, Etc.  An Employee's employment
shall not be deemed to be terminated, for purposes of the Plan, if 
<PAGE 8> he is transferred between or among the Corporation and any
of its Subsidiaries, nor shall termination of employment be deemed
to have taken place solely by reason of the occurrence of a
transaction pursuant to which any entity acquires all or
substantially all of the Corporation's assets by operation of law
or otherwise, provided the employment relationship continues with
the acquiror or a company affiliated with the acquiror. 

ARTICLE 9.  ADJUSTMENT PROVISIONS

     9.1  Share and Exercise Price Adjustments.

          (a)  In the event that the shares of Common Stock, as
     presently constituted, shall be changed into or exchanged for
     a different number or kind of shares of stock or other
     securities of the Corporation or of another corporation
     (whether by reason of merger, consolidation, recapitalization,
     reclassification, split-up, combination of shares or
     otherwise) or if the number of such shares of Common Stock
     shall be increased through the payment of a stock dividend or
     split, then there shall be substituted for or added to each
     share of Common Stock which was theretofore appropriated, or
     which thereafter may become subject to an Option under the
     Plan, the number and kind of shares of stock or other
     securities into which each outstanding share of the Common
     Stock shall be so changed or for which each such share shall
     be exchanged or to which each such share shall be entitled, as
     the case may be.  Outstanding Options shall also be
     appropriately amended, as to Exercise Price and other terms,
     as may be necessary to reflect the foregoing events.

          (b)  If there shall be any other change in the number or
     kind of the outstanding shares of the Common Stock, or of any
     stock or other securities in which such stock shall have been
     changed, or for which it shall have been exchanged, and if a
     majority of the disinterested members of the Board shall, in
     its sole discretion, determine that such change equitably
     requires an adjustment in any Option which was theretofore
     granted or which may thereafter be granted under the Plan,
     then such adjustment shall be made in accordance with such
     determination.

          (c)  The grant of an Option pursuant to the Plan shall
     not affect in any way the right or power of the Corporation to
     make adjustments, reclassifications, reorganizations or
     changes of its capital or business structure, to merge, to
     consolidate, to dissolve, to liquidate or to sell or transfer
     all or any part of its business or assets.

     9.2  Corporate Changes.  Notwithstanding the provisions of
Section 9.1, a dissolution or liquidation of the Corporation, or a
merger or consolidation in which the Corporation is not the 
<PAGE 9> surviving corporation, shall cause each outstanding Option
to terminate, except to the extent that another corporation may and
does in the transaction assume and continue the Option or
substitute its own options.

     9.3  Fractional Shares.  Fractional shares resulting from any
adjustment in Options pursuant to this article may be settled as a
majority of the disinterested members of the Board shall determine.

     9.4  Binding Determination.  To the extent that the foregoing
adjustments relate to stock or securities of the Corporation, such
adjustments shall be made by a majority of the disinterested
members of the Board, whose determination in that respect shall be
final, binding and conclusive.  Notice of any adjustment shall be
given by the Corporation to each holder of an Option which shall
have been so adjusted.

ARTICLE 10.  GENERAL PROVISIONS

     10.1  Effective Date.  The Plan shall become effective on
August 1, 1998, provided that any grant of Options is subject to
the approval of the Plan by the shareholders of the Corporation
within 12 months thereafter.

     10.2  Termination of the Plan.  Unless sooner terminated by
the Board, the Plan shall terminate on, and no Options shall be
granted after, the tenth anniversary of its Effective Date.

     10.3  Limitation on Termination, Amendment, Modification or
Suspension of Plan.

          (a)  The Board may at any time terminate, amend, modify
     or suspend the Plan; provided, however, that no amendment or
     modification shall be made solely by the Board if it is also
     required to be approved by the Corporation's shareholders
     under any applicable securities or corporate law.

          (b)  Except as otherwise provided herein, no termination,
     amendment, modification or suspension of the Plan shall in any
     manner adversely affect any Option theretofore granted under
     the Plan without the consent of the Optionee or any person
     validly claiming under or through the Optionee.

     10.4  No Right to Employment.  Neither anything contained in
this Plan document, nor the grant of any Option hereunder, shall
confer upon any Optionee the right to continue in the employ of the
Corporation or of any Subsidiary or limit in any respect the right
of the Corporation or of any Subsidiary to terminate the Optionee's
employment at any time and for any reason.

     10.5  No Right to Grant of Options.  Nothing in this Plan
document shall be construed as requiring that an Option be granted 
<PAGE 10> to any particular individual, regardless of such
individual's position with the Corporation or any Subsidiary.

     10.6  Withholding Taxes.  Subject to the provisions of
Subsection (b), the Corporation will require that an Optionee, as
a condition of the exercise of an Option (other than an Incentive
Stock Option), or any other person or entity receiving Common Stock
upon exercise of an Option, pay or reimburse any taxes which the
Corporation is required to withhold in connection with the exercise
of the Option.

     10.7  Listing and Registration of Shares.

          (a)  No Option granted pursuant to the Plan shall be
     exercisable in whole or in part if at any time a majority of
     the disinterested members of the Board shall determine in its
     discretion that the listing, registration or qualification of
     the shares of Common Stock subject to such Option on any
     securities exchange or under any applicable law, or the
     consent or approval of any governmental regulatory body, is
     necessary or desirable as a condition of, or in connection
     with, the granting of such Option or the issue of shares
     thereunder, unless such listing, registration, qualification,
     consent or approval shall have been effected or obtained free
     of any conditions not acceptable to a majority of the
     disinterested members of the Board.

          (b)  If a registration statement under the Securities Act
     with respect to the shares issuable upon exercise of any
     Option granted under the Plan is not in effect at the time of
     exercise, as a condition of the issuance of the shares, the
     person exercising such Option shall give the Committee a
     written statement, satisfactory in form and substance to the
     Committee, that he is acquiring the shares for his own account
     for investment and not with a view to their distribution.  The
     Corporation may place upon any stock certificate for shares
     issuable upon exercise of such Option the following legend or
     such other legend as the Committee may prescribe to prevent
     disposition of the shares in violation of the Securities Act
     or other applicable law:

          THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
          REGISTERED UNDER THE SECURITIES ACT OF 1933 ("ACT") AND
          MAY NOT BE SOLD, PLEDGED, HYPOTHECATED OR OTHERWISE
          TRANSFERRED OR OFFERED FOR SALE IN THE ABSENCE OF AN
          EFFECTIVE REGISTRATION STATEMENT WITH RESPECT TO THEM
          UNDER THE ACT OR A WRITTEN OPINION OF COUNSEL FOR THE
          CORPORATION THAT REGISTRATION IS NOT REQUIRED.

     10.8  Number.  Any words used herein in the singular shall be
construed as used in the plural, as appropriate in the relevant
context, and vice versa.  <PAGE 11>

     10.9  Gender.  Any pronoun used herein shall be deemed a
reference to all genders, as appropriate in the relevant context.

     10.10  Governing Law.  Except to the extent preempted by
federal law, this Plan document shall be construed, administered
and enforced in accordance with the domestic internal law of the 
Commonwealth of Pennsylvania.
<PAGE 12>