EXHIBIT 31.1

                                  CERTIFICATION

     The undersigned, in his capacity as the Executive Vice President, Chief
Operating Officer and Treasurer of Motient Corporation, being the principal
executive officer, as the case may be, provides the following certification
required by 18 U.S.C. Section 1350, as adopted pursuant to Section 302 of the
Sarbanes-Oxley Act of 2002.

     I, Christopher W. Downie, hereby certify that:

     1.   I have reviewed this quarterly report on Form 10-Q of Motient
Corporation, a Delaware corporation;

     2.   Based on my knowledge, quarterly report does not contain any untrue
statement of a material fact or omit to state a material fact necessary to make
the statements made, in light of the circumstances under which such statements
were made, not misleading with respect to the period covered by this quarterly
report;

     3.   Based on my knowledge, the financial statements, and other financial
information included in this quarterly report, fairly present in all material
respects the financial condition, results of operations and cash flows of the
registrant as of, and for, the periods presented in this quarterly report;

     4.   The other certifying officer and I are responsible for establishing
and maintaining disclosure controls and procedures (as defined in Exchange Act
Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

          (a) Designed such disclosure controls and procedures, or caused such
          disclosure controls and procedures to be designed under our
          supervision, to ensure that material information relating to the
          registrant, including its consolidated subsidiaries, is made known to
          us by others within those entities, particularly during the period in
          which this report is being prepared;

          (b) Evaluated the effectiveness of the registrant's disclosure
          controls and procedures and presented in this report our conclusions
          about the effectiveness of the disclosure controls and procedures, as
          of the end of the period covered by this report based on such
          evaluation; and

          (c) Disclosed in this report any change in the registrant's internal
          control over financial reporting that occurred during the registrant's
          most recent fiscal quarter that has materially affected, or is
          reasonably likely to materially affect, the registrant's internal
          control over financial reporting; and

     5.   The other certifying officer and I have disclosed, based on my most
recent evaluation of internal control over financial reporting, to the
registrant's auditors and the audit committee of the registrant's board of
directors (or persons performing the equivalent functions):

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          (a) All significant deficiencies and material weaknesses in the design
          or operation of internal control over financial reporting which are
          reasonably likely to adversely affect the registrant's ability to
          record, process, summarize and report financial information; and

          (b) Any fraud, whether or not material, that involves management or
          other employees who have a significant role in the registrant's
          internal control over financial reporting.

                                    /s/ Christopher W. Downie
                                    -------------------------
                                    Christopher W. Downie

                                    Executive Vice President, Chief Operating
                                    Officer and Treasurer (principal executive
                                    officer)

                                    May 15, 2006



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