EXHIBIT 23.3


                          INDEPENDENT AUDITORS' CONSENT


The Board of Directors
AMRC Holdings, Inc.:


We consent to the  incorporation  by  reference in the  registration  statements
(Nos.  33-72852,  33-34250,  33-91714  and   333-30099) on Forms S-8 of American
Mobile Satellite Corporation of our report dated April 10, 1998, with respect to
the  consolidated  balance  sheet  of AMRC  Holdings,  Inc.  and  Subsidiary  (a
development stage company) as of December 31, 1997 and the related  consolidated
statements of operations, stockholders' equity and cash flows for the year ended
December 31, 1997 and for the period from  December 15, 1992 (date of inception)
to December 31, 1997,  which report appears in the December 31, 1997 Form 10-K/A
of American Mobile Satellite Corporation dated April 15, 1998.

Our report, dated April 10, 1998, contains an explanatory  paragraph that states
that the Company has not commenced operations, has a working capital deficit and
is dependent upon additional capital contributions which raise substantial doubt
about its ability to continue as a going  concern.  The  consolidated  financial
statements do not include any adjustments  that might result from the outcome of
that uncertainty.

                            /S/KPMG Peat Marwick LLP

McLean, Virginia
April 15, 1998