Exhibit 99.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Polaris Income Fund III (A California
Limited  Partnership)  (the Partnership) on Form 10-Q for the period ended March
31,  2003,  as filed with the  Securities  and Exchange  Commission  on the date
hereof (the Report),  I, William R. Carpenter,  President of Polaris  Investment
Management  Corporation,  the  General  Partner  of  the  Partnership,  certify,
pursuant  to 18  U.S.C.  ss.  1350,  as  adopted  pursuant  to  ss.  906  of the
Sarbanes-Oxley Act of 2002, that:

         (1) The Report fully complies with the requirements of section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

         (2) The  information  contained in the Report fairly  presents,  in all
material  respects,  the  financial  condition  and result of  operations of the
Partnership.


POLARIS AIRCRAFT INCOME FUND III,
A California Limited Partnership
(Registrant)
By:  Polaris Investment Management Corporation,
     General Partner


By:  /s/ William R. Carpenter
     ------------------------
     William R. Carpenter
     President
     May 14, 2003