Exhibit 99.1

Media Contacts:

Abernathy MacGregor
Winnie Lerner/Jessica Liddell
212-371-5999


                     Motient Announces Stock Buyback Program

LINCOLNSHIRE, IL, November 7, 2005 -- Motient Corporation (MNCP) announced today
that the Executive Committee of its Board of Directors has authorized the
Company to repurchase up to $50 million of its outstanding common shares. The
Company intends to repurchase shares from time to time in the open market or
otherwise under this program. The number of shares to be purchased and the
timing of the purchases will be based on the level of cash balances, general
business conditions and other factors, including alternative investment
opportunities. The program may be discontinued at any time.

"Our goal is to continually look for ways to enhance long-term shareholder value
and the decision to initiate a share repurchase program reflects the Board's
confidence in Motient's long-term growth prospects," said Chris Downie,
Motient's Chief Operating Officer. "We believe Motient's stock represents an
attractive investment at current prices, and we remain focused on opportunities
to leverage our strong financial position through activities like this stock
repurchase program and our pending transaction to consolidate the ownership of
MSV and TerreStar."


                                       ###


About Motient Corporation:

Motient is a nationwide provider of terrestrial wireless data solutions for
Fortune 500 companies and the small to medium size enterprise business market.
Motient provides access to multiple networks platforms, including GPRS, 1XRTT
and its own DataTac Network.Motient simplifies the wireless experience for
application providers, hardware vendors, value added resellers and customers by
offering proprietary applications, one source support and wireless consulting
services that enhance the performance, efficiency and cost-effectiveness of
enterprise wireless networks.

Motient is also the controlling shareholder of TerreStar Networks Inc., a
development-phase satellite communications company, and a minority shareholder
of Mobile Satellite Ventures, LP, an established satellite communications
company. TerreStar and MSV are both in the process of developing next-generation
hybrid networks that plan to provide ubiquitous wireless service by integrating
land-based towers and powerful satellites. These new networks will deliver
services to standard wireless devices everywhere in North America.

http://www.motient.com.
- ----------------------

Statement under the Private Securities Litigation Reform Act:
With the exception of any historical information contained in this release, the
matters described herein contain forward-looking statements that involve risk
and uncertainties that may individually or mutually impact the matters herein
described, which could cause actual results or revenues to differ materially
from those contemplated by these statements.