EXHIBIT 32.1

           CERTIFICATION PURSUANT TO 8 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 Motient Corporation, a
Delaware corporation (the "Company"), on Form 10-Q for the period ending
September 30, 2005, as filed with the Securities and Exchange Commission on the
date hereof (the "Report"), I, Christopher W. Downie, Executive Vice President,
Chief Operating Officer and Treasurer of the Company, certify, in my capacity as
principal executive officer, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge
and based on my review of the Report:

         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
Company.



                               /s/ Christopher W. Downie
                               -------------------------
                               Executive Vice President, Chief Operating Officer
                               and Treasurer (principal executive officer)


                               March 30, 2006