Exhibit 23.1


CONSENT OF INDEPENDENT AUDITORS

     We consent to the incorporation by reference in the Registration
Statements (Forms S-8 Nos. 33-85634, 33-89124, 333-76957 and 333-49290)
pertaining to SkyTerra Communications, Inc., of our report dated April 23,
2004 with respect to the consolidated financial statements of Mobile Satellite
Ventures LP and subsidiaries included in this Form 8-K/A of SkyTerra
Communications, Inc.


/s/ Ernst & Young

McLean, VA
March 23, 2005