EXHIBIT 23.3


                        CONSENT Of INDEPENDENT AUDITORS

We consent to the reference to our firm under the caption "Experts" in the
Registration Statement (Form S-3) and related Prospectus of SkyTerra
Communications, Inc. for the registration of 3,010,000 shares of its common
stock and to the incorporation by reference therein of our report dated
February 18, 2005, with respect to the consolidated financial statements of
Mobile Satellite Ventures LP and subsidiaries, included in SkyTerra
Communications, Inc.'s Annual Report (Form 10-K) for the year ended December
31, 2004, filed with the Securities and Exchange Commission.


/s/ Ernst & Young LLP

McLean, Virginia
April 22, 2005