Exhibit 99.1

                                    RESTATED
                       AIRPORT SYSTEMS INTERNATIONAL, INC.
                             1991 STOCK OPTION PLAN


     1.  Purposes of the Plan.  The  purposes  of this Stock  Option Plan are to
attract and retain the best  available  personnel for  positions of  substantial
responsibility, to provide additional incentive to the Employees and Consultants
of the Company and to promote the success of the Company's business.

     Options  granted  hereunder  may  be  either  Incentive  Stock  Options  or
Nonstatutory  Stock Options,  at the discretion of the Board and as reflected in
the terms of the written option agreement.

     2. Definitions. As used herein, the following definitions shall apply:


     (a) "Board" shall mean the  Committee,  if one has been  appointed,  or the
Board of Directors of the Company, if no Committee is appointed.

     (b) "Code" shall mean the Internal Revenue Code of 1986, as amended.

     (c) "Common Stock" shall mean the Common Stock of the Company.

     (d)  "Company"  shall mean Airport  Systems  International,  Inc., a Kansas
corporation.

     (e)  "Committee"  shall  mean  the  Committee  appointed  by the  Board  of
Directors in accordance  with  paragraph (a) of Section 4 of the Plan, if one is
appointed.

     (f) "Consultant" shall mean any person who is engaged by the Company or any
subsidiary to render consulting  services and is compensated for such consulting
services or any other person determined by the Board to have performed  services
for or on behalf of the  Company  which  merits the grant of an Option,  and any
director of the Company whether  compensated for such services or not;  provided
that if and in the event the Company  registers any class of any equity security
pursuant to Section 12 of the  Securities  Exchange Act of 1934, as amended (the
"Exchange Act"), the term Consultant shall thereafter not include  directors who
are not  compensated for their services or are paid only a director's fee by the
Company.

     (g) "Continuous Status as an Employee or Consultant" shall mean the absence
of any  interruption  or  termination  of service as an Employee or  Consultant.
Continuous  Status  as  an  Employee  or  Consultant  shall  not  be  considered
interrupted  in the case of sick leave,  military  leave,  or any other leave of
absence  approved by the Board;  provided that such leave is for a period of not
more  than 90  days or  reemployment  upon  the  expiration  of  such  leave  is
guaranteed by contract or statute.

     (h)  "Employee"  shall mean any person,  including  officers and directors,
employed by the Company or any Parent or Subsidiary of the Company.  The payment
of a  director's  fee by the  Company  shall  not be  sufficient  to  constitute
"employment" by the Company.

     (i) "Incentive Stock Option" shall mean an Option intended to qualify as an
incentive stock option within the meaning of Section 422A of the Code.

     (j)  "Nonstatutory  Stock  Option"  shall  mean an Option not  intended  to
qualify as an Incentive Stock Option.

                                       12


     (k) "Option" shall mean a stock option granted pursuant to the Plan.


     (l) "Optioned Stock" shall mean the Common Stock subject to an Option.

     (m) "Optionee" shall mean an Employee or Consultant who receives an Option.

     (n) "Parent"  shall mean a "parent  corporation",  whether now or hereafter
existing, as defined in Section 425(e) of the Code.

     (o) "Plan" shall mean this Restated 1991 Stock Option Plan.

     (p)  "Share"  shall  mean a share  of the  Common  Stock,  as  adjusted  in
accordance with Section 12 of the Plan.

     (q)  "Subsidiary"  shall mean a  "subsidiary  corporation",  whether now or
hereafter existing, as defined in Section 425(f) of the Code.

     3. Stock  Subject to the Plan.  Subject to the  provisions of Section 12 of
the Plan, the maximum  aggregate number of shares which may be optioned and sold
under the Plan is 475,000 shares of Common Stock.  The Shares may be authorized,
but unissued, or reacquired Common Stock.

     If an Option should expire or become  unexercisable  for any reason without
having been exercised in full, the unpurchased Shares which were subject thereto
shall,  unless the Plan shall have been terminated,  become available for future
grant under the Plan.  Notwithstanding  any other provision of the Plan,  shares
issued  under  the  Plan and  later  repurchased  by the  Company  shall  become
available for future grant or sale under the Plan.

     4. Administration of the Plan.

     (a) Procedure.  The Plan shall be administered by the Board of Directors of
the Company.

          (i) Subject to subparagraph (ii), the Board of Directors may appoint a
     Committee consisting of not less than two members of the Board of Directors
     to administer the Plan on behalf of the Board of Directors, subject to such
     terms  and  conditions  as the  Board  of  Directors  may  prescribe.  Once
     appointed,  the Committee shall continue to serve until otherwise  directed
     by the Board of Directors. Members of the Board who are either eligible for
     Options or have been granted Options may vote on any matters  affecting the
     administration  of the Plan or the  grant of any  Options  pursuant  to the
     Plan,  except that no such member  shall act upon the granting of an Option
     to himself, but any such member may be counted in determining the existence
     of a quorum at any meeting of the Board  during  which action is taken with
     respect to the granting of Options to him.

          (ii)  Notwithstanding the foregoing  subparagraph (i), if in any event
     the Company  registers any class of any equity security pursuant to Section
     12 of the Exchange Act, from the effective date of such  registration  (the
     "Effective   Date")  until  six  months  after  the   termination  of  such
     registration (the "Termination Date"), any grants of options to officers or
     directors shall only be made by the Board of Directors;  provided, however,
     that if any of the  members  of the  Board of  Directors  are  eligible  to
     participate  in this Plan or any other stock  option or other stock plan of
     the  Company or any of its  affiliates,  or has been  eligible  at any time
     within the preceding  year,  any grants of options to officers or directors
     of  the  Company  must  be  made  by,  or  only  in  accordance   with  the
     recommendation  of,  a  Committee  consisting  of  two or  more  directors,
     appointed by the Board of Directors and having full authority to act in the
     matter,  none of whom is eligible to  participate in this Plan or any other
     stock  option or other stock plan of the Company or any of its

                                       13


     affiliates,  or has been  eligible at any time within the  preceding  year.
     Once  appointed,  the  Committee  shall  continue to serve until  otherwise
     directed by the Board of Directors.

          (iii) Subject to the foregoing  subparagraphs  (i) and (ii), from time
     to time the Board of Directors  may increase the size of the  Committee and
     appoint additional members thereof,  remove members (with or without cause)
     and appoint new members in substitution  therefor,  fill vacancies  however
     caused,  or remove all members of the  Committee  and  thereafter  directly
     administer the Plan.

     (b) Powers of the Board.  Subject to the  provisions of the Plan, the Board
shall  have the  authority,  in its  discretion:  (i) to grant  Incentive  Stock
Options or Nonstatutory Stock Options; (ii) to determine upon review of relevant
information  and in  accordance  with Section 8(b) of the Plan,  the fair market
value of the Common Stock;  (iii) to determine  the exercise  price per share of
Options to be granted,  which  exercise  price shall be determined in accordance
with Section 8(a) of the Plan; (iv) to determine the Employees or Consultants to
whom,  and; the time or times at which,  Options shall be granted and the number
of shares to be represented by each Option;  (v) to interpret the Plan;  (vi) to
prescribe,  amend and rescind rules and regulations  relating to the Plan; (vii)
to determine the terms and  provisions of each Option granted (which need not be
identical)  and,  with the consent of the holder  thereof,  modify or amend each
Option;  (viii) to  accelerate  or defer (with the consent of the  Optionee) the
exercise date of any Option,  consistent with the provisions of Section 5 of the
Plan;  (ix) to  authorize  any person to execute  on behalf of the  Company  any
instrument  required to effectuate the grant of an Option previously  granted by
the  Board;  and  (x) to make  all  other  determinations  deemed  necessary  or
advisable for the administration of the Plan.

     (c)  Effect  of  Board's  Decision.   All  decisions,   determinations  and
interpretations of the Board shall be final and binding on all Optionees and any
other holders of any Options granted under the Plan.

     5. Eligibility.

     (a) Options may be granted only to  Employees  and  Consultants.  Incentive
Stock  Options may be granted only to Employees.  An Employee or Consultant  who
has been  granted an Option  may,  if he is  otherwise  eligible,  be granted an
additional Option or Options.

     (b) To the extent that the aggregate fair market value of Common Stock with
respect to which  Incentive  Stock Options are exercisable for the first time by
any  Optionee  during any  calendar  year (under all plans of the Company or any
Parent or Subsidiary)  exceeds  $100,000,  such Incentive Stock Options shall be
treated as Nonstatutory Stock Options.

     (c) Section 5(b) of the Plan shall apply only to an Incentive  Stock Option
evidenced  by an  "Incentive  Stock  Option  Agreement"  which  sets  forth  the
intention of the Company and the Optionee  that such Option shall  qualify as an
incentive  stock option.  Section 5(b) of the Plan shall not apply to any Option
evidenced  by a  "Nonstatutory  Stock  Option  Agreement"  which  sets forth the
intention  of  the  Company  and  the  Optionee  that  such  Option  shall  be a
Nonstatutory Stock Option.

     (d) The Plan shall not confer upon any  Optionee  any right with respect to
continuation  of  employment or consulting  relationship  with the Company,  nor
shall it interfere in any way with his right or the Company's right to terminate
his employment or consulting relationship at any time.

     6. Term of Plan. The Plan shall become  effective upon the earlier to occur
of its adoption by the Board of Directors or its approval by the shareholders of
the Company as described in Section 18 of the Plan. It shall  continue in effect
for a term of ten (10) years unless  sooner  terminated  under Section 14 of the
Plan.

                                       14


     7. Term of Options.  The term of each  Incentive  Stock Option shall be ten
(10)  years  from the  date of  grant  thereof  or such  shorter  term as may be
provided in the Incentive Stock Option  Agreement.  The term of each Option that
is not an Incentive  Stock Option shall be determined by the Board and set forth
in the Option  Agreement.  However,  in the case of an  Incentive  Stock  Option
granted to an Optionee who, at the time the  Incentive  Stock Option is granted,
owns stock  representing  more than ten percent (10%) of the voting power of all
classes of stock of the  Company or any  Parent or  Subsidiary,  the term of the
Incentive Stock Option shall be five (5) years from the date of grant thereof or
such shorter time may in the Incentive Stock Option Agreement.

     8. Exercise Price and Consideration.

     (a)  Exercise  Price.  The per Share  exercise  price for the  Shares to be
issued pursuant to exercise of an Option shall be such price as is determined by
the Board, but shall be subject to the following:

          (i) In the case of an Incentive Stock Option

               (A) granted to an Employee  who, at the time of the grant of such
          Incentive Stock Option,  owns stock representing more than ten percent
          (10%) of the voting  power of all  classes of stock of the Company or,
          any Parent or  Subsidiary,  the per Share  exercise  price shall be no
          less  than  110% of the fair  market  value  per  Share on the date of
          grant.

               (B) granted to any other  Employee,  the per Share exercise price
          shall be no less than 100% of the fair  market  value per Share on the
          date of grant.

          (ii) in the case of an Option  granted on or after the effective  date
     of registration of any class of equity security of the Company  pursuant to
     Section  12 of  the  Exchange  Act  and  prior  to  six  months  after  the
     termination of such registration,  the per Share exercise price shall be no
     less than 100% of the fair market value per Share on the date of grant.

          (iii) In the case of  Non-Statutory  Stock  Options,  at any price per
     share determined by the Board.

     (b) Fair Market  Value.  The fair market value shall be  determined  by the
Board in its discretion;  provided, however, that where there is a public market
for the Common  Stock,  the fair market value per Share shall be the mean of the
bid and asked prices (or the closing  price per share if the Common Stock listed
on  that  National   Association  of  Securities  Dealers  Automated   Quotation
("NASDAQ") National Market System) of the Common Stock for the date of grant, as
reported  in The Wall  Street  Journal  (or, if not so  reported,  as  otherwise
reported by the NASDAQ  System) or, in the event the Common Stock is listed on a
stock  exchange,  the fair market value per Share shall be the closing  price on
such exchange on the date of grant of the Option, as reported in The Wall Street
Journal.

     (c) Form of  Consideration.  The consideration to be paid for the Shares to
be issued upon exercise of an Option,  including the method of payment, shall be
determined by the Board and may consist entirely of cash, check, other Shares of
Common Stock  having a fair market  value on the date of surrender  equal to the
aggregate  exercise  price  of the  Shares  as to  which  said  option  shall be
exercised,  or any  combination  of such  methods  of  payment,  or  such  other
consideration  and method of payment  for the  issuance  of Shares to the extent
permitted  under  K.S.A.  Sections  17-6402,  17-6403  and 17-6407 of the Kansas
General  Corporation  Code.  In  making  its  determination  as to the  type  of
consideration  to  accept,  the  Board  shall  consider  if  acceptance  of such
consideration may be reasonably expected to benefit the Company.

                                       15


     9. Exercise of Option.

     (a)  Procedure for Exercise  Rights as a  Shareholder.  Any Option  granted
hereunder  shall be  exercisable  at such  times and under  such  conditions  as
determined  by the Board,  including  performance  criteria  with respect to the
Company and/or the Optionee,  and as shall be permissible under the terms of the
Plan.

     An Option may not be exercised for a fraction of a Share.

     An Option  shall be  deemed to be  exercised  when  written  notice of such
exercise in the form  required by the  Nonstatutory  or  Incentive  Stock Option
Agreement  has been  given to the  Company in  accordance  with the terms of the
Option by the person  entitled to exercise  the Option and full  payment for the
Shares with  respect to which the Option is exercised  has been  received by the
Company.  Full  payment  may,  as  authorized  by  the  Board,  consist  of  any
consideration  and method of payment  allowable  under Section 8(c) of the Plan.
Until.  the issuance (as evidenced by the appropriate  entry on the books of the
Company or of a duly  authorized  transfer  agent of the  Company)  of the stock
certificate evidencing such Shares, no right to vote or receive dividends or any
other rights as a  shareholder  shall exist with respect to the Optioned  Stock,
notwithstanding the exercise of the Option. The Company shall issue (or cause to
be issued)  such stock  certificate  promptly  upon  exercise of the Option.  No
adjustment  will be made for a dividend or other right for which the record date
is prior to the date the stock  certificate  is issued,  except as  provided  in
Section 12 of the Plan.

     Exercise  of an Option in any  manner  shall  result in a  decrease  in the
number of Shares which  thereafter  may be  available,  both for purposes of the
Plan and for purchase under the Option,  by the number of Shares as to which the
Option is exercised.

     10. Certain Events Affecting Exercisability of Incentive Stock Options.

     (a)  Termination  of Status as an Employee or  Consultant.  With respect to
Incentive Stock Options, in the event of termination of an Optionee's Continuous
Status as an Employee or Consultant (as the case may be), such Optionee may, but
only within  sixty (60) days (or such other period of time not  exceeding  three
(3) months as is determined by the Board, with such determination  being made at
the  time of  grant  of the  Option)  after  such  event  of  termination  of an
Optionee's  Continuous  Status as an Employee or Consultant (as the case may be)
(but in no event later than the date of expiration of the term of such Incentive
Stock Option as set forth in the Incentive Stock Option Agreement), exercise his
Incentive  Stock Option to the extent that he was entitled to exercise it at the
date of such termination. To the extent that he was not entitled to exercise the
Incentive  Stock  Option  at the  date of such  termination,  or if he does  not
exercise such Incentive Stock Option (which he was entitled to exercise)  within
the time specified herein, the Incentive Stock Option shall terminate.

     (b)  Disability  of  Optionee.  With respect to  Incentive  Stock  Options,
notwithstanding   the  provision  of  Section  10(a)  above,  in  the  event  of
termination of an Optionee's  Continuous Status as an Employee or Consultant (as
the case may be) as a result of his total and permanent  disability  (as defined
in Section  22(e)(3)  of the Code),  he may,  but only within six (6) months (or
such other period of time not  exceeding  twelve (12) months as is determined by
the  Board,  with  such  determination  being  made at the  time of grant of the
Incentive Stock Option) from the date of termination (but in no event later than
the date of expiration of the term of such  Incentive  Stock Option as set forth
in the Incentive Stock Option Agreement), exercise his Incentive Stock Option to
the extent he was  entitled to exercise it at the date of such  termination.  To
the extent that he was not  entitled to exercise the  Incentive  Stock Option at
the date of termination,  or if he does not exercise such Incentive Stock Option
(which he was  entitled  to  exercise)  within the time  specified  herein,  the
Incentive Stock Option shall terminate.

     (c) Death of  Optionee.  With respect to Incentive  Stock  Options,  in the
event of the death of an Optionee:

                                       16


          (i) who is at the time of his death an Employee or  Consultant  of the
     Company  and who shall have been in  Continuous  Status as an  Employee  or
     Consultant  since  the date of grant of the  Incentive  Stock  Option,  the
     Incentive Stock Option may be exercised, at any time within nine (9) months
     following  the  date of  death  (but in no  event  later  than  the date of
     expiration of the term of such  Incentive  Stock Option as set forth in the
     Incentive Stock Option Agreement),  by the Optionee's estate or by a person
     who acquired the right to exercise the Incentive Stock Option by bequest or
     inheritance,  but only to the  extent of the right to  exercise  that would
     have accrued had the Optionee  continued  living and remained in Continuous
     Status as an Employee or Consultant six (6) months after the date of death,
     subject to the limitation set forth in Section 5(b); or

          (ii) which  occurs  within  thirty (30) days (or such other  period of
     time not exceeding  three (3) months as is  determined  by the Board,  with
     such  determination  being made at the time of grant of the Incentive Stock
     Option)  after the  termination  of  Continuous  Status as an  Employee  or
     Consultant, the Incentive Stock Option may be exercised, at any time within
     nine (9) months following the date of death (but in no event later than the
     date of expiration of the term of such Incentive  Stock Option as set forth
     in the Incentive Stock Option Agreement),  by the Optionee's estate or by a
     person who  acquired the right to exercise  the  Incentive  Stock Option by
     bequest or  inheritance,  but only to the  extent of the right to  exercise
     that had accrued at the date of termination.

     11.  Non-Transferability  of Options.  The Option may not be sold, pledged,
assigned, hypothecated,  transferred, or disposed of in any manner other than by
will or by the laws of descent or distribution and may be exercised,  during the
lifetime of the Optionee, only by the Optionee.

     12.  Adjustments Upon Changes in Capitalization  or Merger.  Subject to any
required  action by the  shareholders  of the  Company,  the number of shares of
Common Stock  covered by each  outstanding  Option,  and the number of shares of
Common Stock which have been  authorized  for issuance  under the Plan but as to
which no Options have yet been  granted or which have been  returned to the Plan
upon  cancellation or expiration of an Option, as well as the price per share of
Common Stock covered by each such outstanding  Option,  shall be proportionately
adjusted for any  increase or decrease in the number of issued  shares of Common
Stock  resulting  from a stock  split,  reverse  stock  split,  stock  dividend,
combination or  reclassification  of the Common Stock,  or any other increase or
decrease in the number of issued shares of Common Stock effected without receipt
of  consideration  by the Company;  provided,  however,  that  conversion of any
convertible  securities of the Company shall not be deemed to have been effected
without receipt of  consideration.  Such adjustment  shall be made by the Board,
whose  determination  in that respect  shall be final,  binding and  conclusive.
Except as  expressly  provided  herein,  no issuance by the Company of shares of
stock of any class, or securities convertible into shares of stock of any class,
shall affect, and no adjustment by reason thereof shall be made with respect to,
the number or price of shares of Common Stock subject to an Option.

     In the event of the proposed dissolution or liquidation of the Company, the
Option will terminate  immediately  prior to the  consummation  of such proposed
action,  unless otherwise  provided by the Board. The Board may, in the exercise
of its  sole  discretion  in such  instances,  declare  that  any  Option  shall
terminate  as of a date fixed by the Board and give each  Optionee  the right to
exercise  his  Option  as to all or any part of the  Optioned  Stock,  including
Shares as to which the Option would not otherwise be  exercisable.  In the event
of a proposed sale of all or substantially all of the assets of the Company,  or
the merger of the Company with or into another corporation,  the Option shall be
assumed  or  an  equivalent  option  shall  be  substituted  by  such  successor
corporation or a parent or subsidiary of such successor corporation.  Unless the
option  agreement  granting  an  Option  to an  Optionee  specifically  provides
otherwise,  in the event that such successor  corporation  refuses to assume the
Option or to substitute an equivalent  option,  the Board shall, in lieu of such
assumption  or  substitution,  provide  for the  Optionee  to have the  right to
exercise  the Option as to all of the  Optioned  Stock,  including  Shares as to
which the  Option  would not  otherwise  be  exercisable.  The Board  shall give
written  notice  to each  holder of an  Option  of the  pendency  of the sale of
substantially  all of the assets of the Company,  a merger involving

                                       17


the Company or the  dissolution  or liquidation of the Company not less than ten
days prior to such  transaction.  If the Board makes an Option fully exercisable
in lieu of  assumption  or  substitution  in the  event of a  merger  or sale of
assets,  the Board  shall  notify the  Optionee  that the Option  shall be fully
exercisable  for a period of thirty (30) days from the date of such notice,  and
the Option will terminate upon the expiration of such period.

     13. Time of Granting Options. The date of grant of an Option shall, for all
purposes,  be the date on which the Board makes the determination  granting such
Option.  Notice  of the  determination  shall  be  given  to  each  Employee  or
Consultant  to whom an Option is so granted  within a reasonable  time after the
date of such grant.

     14. Amendment and Termination of the Plan.

     (a)  Amendment and  Termination.  The Board may amend or terminate the Plan
from time to time in such  respects  as the Board may deem  advisable;  provided
that,  the  following  revisions or  amendments  shall  require  approval of the
shareholders of the Company in the manner described in Section 18 of the Plan:

          (i) any  increase in the number of Shares  subject to the Plan,  other
     than in connection with an adjustment under Section 12 of the Plan;

          (ii) any change in the designation of the class of persons eligible to
     be granted Options; or

          (iii) if the Company has a class of equity securities registered under
     Section 12 of the Exchange Act at the time of such  revision or  amendment,
     any material  increase in the benefit  accruing to  participants  under the
     Plan.

     (b) Shareholder  Approval.  If any amendment requiring shareholder approval
under Section 14(a) of the Plan is made subsequent to the first  registration of
any class of equity  securities  by the Company under Section 12 of the Exchange
Act, such shareholder  approval shall be solicited as described in Section 18 of
the Plan.

     (c) Effect of Amendment or  Termination.  Any such amendment or termination
of the Plan shall not affect  Options  already  granted and such  Options  shall
remain  in full  force  and  effect  as if this  Plan  had not been  amended  or
terminated, unless mutually agreed otherwise between the Optionee and the Board,
which agreement must be in writing and signed by the Optionee and the Company.

     15. Conditions Upon Issuance of Shares. Shares shall not be issued pursuant
to the exercise of an Option unless the exercise of such Option and the issuance
and  delivery of such Shares  pursuant  thereto  shall  comply with all relevant
provisions of law, including,  without limitation the Securities Act of 1933, as
amended, the Exchange Act, the rules and regulations promulgated thereunder, and
the requirements of any stock exchange upon which the Shares may then be listed,
and shall be further  subject to the  approval of counsel  for the Company  with
respect to such compliance.

     As, a condition to the  exercise of an Option,  the Company may require the
person  exercising  such Option to represent and warrant at the time of any such
exercise that the Shares are being purchased only for investment and without any
present  intention  to sell or  distribute  such  Shares  if, in the  opinion of
counsel  for  the  Company,  such a  representation  is  required  by any of the
aforementioned relevant provisions of law.

     16. Reservation of Shares. The Company,  during the term of this Plan, will
at all  times  reserve  and keep  available  such  number  of Shares as shall be
sufficient to satisfy the requirements of the Plan.

                                       18


     The inability of the Company to obtain  authority from any regulatory  body
having  jurisdiction,  which authority is deemed by the Company's  counsel to be
necessary to the lawful issuance and sale of any Shares hereunder, shall relieve
the  Company of any  liability  in respect of the  failure to issue or sell such
Shares as to which such requisite authority shall not have been obtained.

     17.  Option  Agreement.  Options  shall  be  evidenced  by  written  option
agreements in such form as the Board shall approve.

     18. Shareholder Approval.

     (a)   Continuance  of  the  Plan  shall  be  subject  to  approval  by  the
shareholders  of the Company  within twelve (12) months before or after the date
the Plan is  adopted.  If such  shareholder  approval is obtained at a duly held
shareholders'  meeting,  it  must be  obtained  by the  affirmative  vote of the
holders of a  majority  of the  outstanding  shares of the  Company,  or if such
shareholder  approval is obtained by written consent, it must be obtained by the
unanimous written consent of all shareholders of the Company; provided, however,
that  approval  at a meeting or by written  consent  may be obtained by a lesser
degree of shareholder approval if the Board determines,  in its discretion after
consultation  with the  Company's  legal  counsel,  that such a lesser degree of
shareholder approval will comply with all applicable laws and will not adversely
affect the qualification of the Plan under Section 422A of the Code.

     (b) If and in the  event  that the  Company  registers  any class of equity
securities  pursuant to Section 12 of the Exchange Act, any required approval of
the  shareholders  of the  Company  obtained  after such  registration  shall be
solicited substantially in accordance with Section 14(a) of the Exchange Act and
the rules and regulations promulgated thereunder.

     (c) If any required  approval by the  shareholders of the Plan itself or of
any  amendment  thereto is  solicited at any time  otherwise  than in the manner
described in Section 18(b) hereof,  then the Company  shall,  at or prior to the
first annual  meeting of  shareholders  held  subsequent to the later of (1) the
first  registration  of any  class of equity  securities  of the  Company  under
Section 12 of the Exchange Act or (2) the granting of an Option  hereunder to an
officer or director after such registration, do the following:

          (i) furnish in writing,  to the holders  entitled to vote for the Plan
     substantially  the same information  which would be required (if proxies to
     be voted with respect to approval or  disapproval  of the Plan or amendment
     were then being  solicited)  by the rules and  regulations  in effect under
     Section  14(a)  of the  Exchange  Act  at  the  time  such  information  is
     furnished; and

          (ii) file with,  or mail for filing to, the  Securities  and  Exchange
     Commission four copies of the written information referred to in subsection
     (i) hereof not later than the date on which such  information is first sent
     or given to shareholders.

     19.  Gender  Reference.  The words "he",  "him" or "his" shall be deemed to
include the feminine and neuter gender of such words.

     Adopted by the Board of Directors of Airport Systems International, Inc. on
May 15, 1998, and approved by the stockholders on September 15, 1998.

                                               Thomas C. Cargin, Secretary