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, provides the following certifications 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 amended annual report on Form 10-K/A of Motient
Corporation, a Delaware corporation;

         2. Based on my knowledge, this amended annual 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 report;

         3. Based on my knowledge, the financial statements, and other financial
information included in this amended annual 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 report;

         4. The registrant's 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 Company's 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):

                  (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 23, 2005