SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
                                ----------------

                                  SCHEDULE 13D
                                 (Rule 13d-101)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
            TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
                                  RULE 13d-2(a)

                                (Amendment No. 4)

                          Skyterra Communications, Inc.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                               Voting Common Stock
--------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                    83087K107
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                  Joel Piassick
                          One Riverchase Parkway South
                            Birmingham, Alabama 35244
--------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                               September 21, 2006
--------------------------------------------------------------------------------
             (Date of Event which Requires Filing of This Statement)

     If the filing person has previously filed a statement on Schedule 13G to
report the  acquisition  that is the subject of this Schedule 13D, and is filing
this  schedule  because  of Rule  13d-1(e),  13d-1(f)  or  13d-1(g),  check  the
following box [ ].

          Note:  Schedules filed in paper format shall include a signed original
     and five copies of the schedule, including all exhibits. See Rule 13d-7 for
     other parties to whom copies are to be sent.

----------
(1)  The  remainder  of this  cover  page  shall be filled  out for a  reporting
     person's  initial  filing on this form with respect to the subject class of
     securities,  and for any subsequent amendment containing  information which
     would alter disclosures provided in a prior cover page.

     The  information  required on the remainder of this cover page shall not be
deemed to be "filed"  for the purpose of Section 18 of the  Securities  Exchange
Act of 1934 or otherwise  subject to the  liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).

CUSIP No. 83087K107
          ---------------------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Harbinger Capital Partners Master Fund I, Ltd.

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]
3.   SEC USE ONLY


4.   SOURCE OF FUNDS*

     WC

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                   [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     Cayman Islands

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     4,433,262

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     4,433,262

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     4,433,262

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*


13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     16.7%

14.  TYPE OF REPORTING PERSON*

     CO

CUSIP No. 83087K107
          ---------------------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Harbinger Capital Partners Offshore Manager, L.L.C.

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]
3.   SEC USE ONLY


4.   SOURCE OF FUNDS*

     AF

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                   [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     4,433,262

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     4,433,262

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     4,433,262

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*


13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     16.7%

14.  TYPE OF REPORTING PERSON*

     CO

CUSIP No. 83087K107
          ---------------------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     HMC Investors, L.L.C.

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]
3.   SEC USE ONLY


4.   SOURCE OF FUNDS*

     AF

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                   [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     4,433,262

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     4,433,262

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     4,433,262

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*


13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     16.7%

14.  TYPE OF REPORTING PERSON*

     CO

CUSIP No. 83087K107
          ---------------------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Harbinger Capital Partners Special Situations Fund, L.P.

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]
3.   SEC USE ONLY


4.   SOURCE OF FUNDS*

     WC

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                   [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     1,500,000

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     1,500,000

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     1,500,000

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*


13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     5.6%

14.  TYPE OF REPORTING PERSON*

     CO

CUSIP No. 83087K107
          ---------------------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Harbinger Capital Partners Special Situations GP, LLC

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]
3.   SEC USE ONLY


4.   SOURCE OF FUNDS*

     AF

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                   [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     1,500,000

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     1,500,000

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     1,500,000

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*


13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     5.6%

14.  TYPE OF REPORTING PERSON*

     CO

CUSIP No. 83087K107
          ---------------------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     HMC - New York, Inc.

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]
3.   SEC USE ONLY


4.   SOURCE OF FUNDS*

     AF

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                   [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     New York

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     1,500,000

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     1,500,000

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     1,500,000

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*


13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     5.6%

14.  TYPE OF REPORTING PERSON*

     CO

CUSIP No. 83087K107
          ---------------------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Harbert Management Corporation

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]
3.   SEC USE ONLY


4.   SOURCE OF FUNDS*

     AF

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                   [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     Alabama

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     5,933,262

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     5,933,262

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     5,933,262

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*


13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     22.3%

14.  TYPE OF REPORTING PERSON*

     CO

CUSIP No. 83087K107
          ---------------------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Philip Falcone

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]
3.   SEC USE ONLY


4.   SOURCE OF FUNDS*

     AF

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                   [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     U.S.A.

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     5,933,262

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     5,933,262

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     5,933,262

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*


13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     22.3%

14.  TYPE OF REPORTING PERSON*

     IN

CUSIP No. 83087K107
          ---------------------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Raymond J. Harbert

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]
3.   SEC USE ONLY


4.   SOURCE OF FUNDS*

     AF

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                   [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     U.S.A.

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     5,933,262

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     5,933,262

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     5,933,262

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*


13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     22.3%

14.  TYPE OF REPORTING PERSON*

     IN

CUSIP No. 83087K107
          ---------------------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Michael D. Luce

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]
3.   SEC USE ONLY


4.   SOURCE OF FUNDS*

     AF

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                   [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     U.S.A.

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     5,933,262

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     5,933,262

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     5,933,262

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*


13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     22.3%

14.  TYPE OF REPORTING PERSON*

     IN

CUSIP No. 83087K107
          ---------------------

--------------------------------------------------------------------------------
Item 1.  Security and Issuer.

     Skyterra Communications, Inc. (the "Issuer"), Voting Common Stock (the
"Shares")

The address of the issuer is 19 West 44th Street, Suite 507, New York, New York
10036.

--------------------------------------------------------------------------------
Item 2.  Identity and Background.

(a-c,f) This Schedule 13D is being filed by Harbinger Capital Partners
Master Fund I, Ltd. (the "Master Fund"), Harbinger Capital Partners Offshore
Manager, L.L.C. ("Harbinger Management"), the investment manager of the Master
Fund, HMC Investors, L.L.C., its managing member ("HMC Investors"), Harbinger
Capital Partners Special Situations Fund, L.P. (the "Special Fund"), Harbinger
Capital Partners Special Situations GP, LLC, the general partner of the Special
Fund ("HCPSS"), HMC - New York, Inc., the managing member of HCPSS ("HMCNY"),
Harbert Management Corporation ("HMC"), the managing member of HMC Investors and
the parent of HMCNY, Philip Falcone, a shareholder of HMC and the portfolio
manager of the Master Fund and the Special Fund, Raymond J. Harbert , a
shareholder of HMC, and Michael D. Luce, a shareholder of HMC (each of the
Master Fund, Harbinger Management, HMC Investors, HMC, Special Fund, HCPSS,
HMCNY, Philip Falcone, Raymond J. Harbert and Michael D. Luce may be referred to
herein as a "Reporting Person" and collectively may be referred to as "Reporting
Persons").

The Master Fund is a Cayman Islands corporation with its principal business
address at c/o International Fund Services (Ireland) Limited, Third Floor,
Bishop's Square, Redmond's Hill, Dublin 2, Ireland. Each of Harbinger
Management, HMC Investors and HCPSS is a Delaware limited liability company. The
Special Fund is a Delaware limited partnership. HMC is an Alabama corporation.
HMCNY is a New York corporation.  Each of Philip Falcone, Raymond J. Harbert and
Michael D. Luce is a United States citizen. The principal business address for
each of the Special Fund, HCPSS, HMCNY and Philip Falcone is 555 Madison Avenue,
16th Floor, New York, New York 10022. The principal business address for each of
Harbinger Management, HMC Investors, HMC, Raymond J. Harbert and Michael D. Luce
is One Riverchase Parkway South, Birmingham, Alabama 35244.

     (d) None of Philip Falcone, Raymond J. Harbert or Michael D. Luce has,
during the last five years, been convicted in a criminal proceeding (excluding
traffic violations or similar misdemeanors).

     (e) None of the Reporting Persons have, during the last five years, been a
party to a civil proceeding of a judicial or administrative body of competent
jurisdiction and as a result of such proceeding were or are subject to a
judgement, decree or final order enjoining future violations of, or prohibiting
or mandating activities subject to, Federal or state securities laws or finding
any violation with respect to such laws.

--------------------------------------------------------------------------------
Item 3.  Source and Amount of Funds or Other Consideration.

As of the date hereof the Master Fund may be deemed to beneficially own
4,433,262 Shares.

As of the date hereof Harbinger Management may be deemed to beneficially own
4,433,262 Shares.

As of the date hereof HMC Investors may be deemed to beneficially own 4,433,262
Shares.

As of the date hereof the Special Fund may be deemed to beneficially own
1,500,000 Shares.

As of the date hereof HCPSS may be deemed to beneficially own 1,500,000 Shares.

As of the date hereof HMCNY may be deemed to beneficially own 1,500,000 Shares.

As of the date hereof HMC may be deemed to beneficially own 5,933,262 Shares.

As of the date hereof Philip Falcone may be deemed to beneficially own 5,933,262
Shares.

As of the date hereof Raymond J. Harbert may be deemed to beneficially own
5,933,262 Shares.

As of the date hereof Michael D. Luce may be deemed to beneficially own
5,933,262 Shares.

No borrowed funds were used to purchase the Shares, other than any borrowed
funds used for working capital purposes in the ordinary course of business.

--------------------------------------------------------------------------------
Item 4.  Purpose of Transaction.

The Reporting Persons have acquired their Shares of the Issuer for investment.
The Reporting Persons evaluate their investment in the Shares on a continual
basis. The Reporting Persons have no plans or proposals as of the date of this
filing which, other than as expressly set forth below, relate to, or would
result in, any of the actions enumerated in Item 4 of the instructions to
Schedule 13D.

The Reporting Persons reserve the right to be in contact with members of the
Issuer's management, the members of the Issuer's Board of Directors, other
significant shareholders and others regarding alternatives that the Issuer could
employ to increase shareholder value.

The Reporting Persons reserve the right to effect transactions that would change
the number of shares they may be deemed to beneficially own.

The Reporting Persons further reserve the right to act in concert with any other
shareholders  of the Issuer,  or other  persons,  for a common purpose should it
determine  to do so,  and/or to  recommend  courses  of  action to the  Issuer's
management,  the Issuer's  Board of  Directors,  the Issuer's  shareholders  and
others.

--------------------------------------------------------------------------------
Item 5.  Interest in Securities of the Issuer.

(a, b) As of the date hereof, the Master Fund may be deemed to be the beneficial
owner of 4,433,262 Shares, constituting 16.7% of the Shares of the Issuer, based
upon 26,564,206 Shares outstanding as of September 21, 2006.

     The Master Fund has the sole power to vote or direct the vote of 0 Shares;
has the shared power to vote or direct the vote of 4,433,262 Shares; has sole
power to dispose or direct the disposition of 0 Shares; and has shared power to
dispose or direct the disposition of 4,433,262 Shares.

(a, b) As of the date hereof, Harbinger Management may be deemed to be the
beneficial owner of 4,433,262 Shares, constituting 16.7% of the Shares of the
Issuer, based upon 26,564,206 Shares outstanding as of September 21, 2006.

     Harbinger Management has the sole power to vote or direct the vote of 0
Shares; has the shared power to vote or direct the vote of 4,433,262 Shares; has
sole power to dispose or direct the disposition of 0 Shares; and has shared
power to dispose or direct the disposition of 4,433,262 Shares.

Harbinger Management specifically disclaims beneficial ownership in the Shares
reported herein except to the extent of its pecuniary interest therein.

(a, b) As of the date hereof, HMC Investors may be deemed to be the beneficial
owner of 4,433,262 Shares, constituting 16.7% of the Shares of the Issuer, based
upon 26,564,206 Shares outstanding as of September 21, 2006.

     HMC Investors has the sole power to vote or direct the vote of 0 Shares;
has the shared power to vote or direct the vote of 4,433,262 Shares; has sole
power to dispose or direct the disposition of 0 Shares; and has shared power to
dispose or direct the disposition of 4,433,262 Shares.

HMC Investors specifically disclaims beneficial ownership in the Shares reported
herein except to the extent of its pecuniary interest therein.

(a, b) As of the date hereof, the Special Fund may be deemed to be the
beneficial owner of 1,500,000 Shares, constituting 5.6% of the Shares of the
Issuer, based upon 26,564,206 Shares outstanding as of September 21, 2006.

     The Special Fund has the sole power to vote or direct the vote of 0 Shares;
has the shared power to vote or direct the vote of 1,500,000 Shares; has sole
power to dispose or direct the disposition of 0 Shares; and has shared power to
dispose or direct the disposition of 1,500,000 Shares.

     The Special Fund specifically disclaims beneficial ownership in the Shares
reported herein except to the extent of its pecuniary interest therein.

(a, b) As of the date hereof, HCPSS may be deemed to be the beneficial
owner of 1,500,000 Shares, constituting 5.6% of the Shares of the Issuer,
based upon 26,564,206 Shares outstanding as of September 21, 2006.

     HCPSS has the sole power to vote or direct the vote of 0 Shares;
has the shared power to vote or direct the vote of 1,500,000 Shares; has sole
power to dispose or direct the disposition of 0 Shares; and has shared power to
dispose or direct the disposition of 1,500,000 Shares.

HCPSS specifically disclaims beneficial ownership in the Shares reported
herein except to the extent of its pecuniary interest therein.

     (a, b) As of the date hereof, HMCNY may be deemed to be the beneficial
owner of 1,500,000 Shares, constituting 5.6% of the Shares of the Issuer,
based upon 26,564,206 Shares outstanding as of September 21, 2006.

     HMCNY has the sole power to vote or direct the vote of 0 Shares; has the
shared power to vote or direct the vote of 1,500,000 Shares; has sole power to
dispose or direct the disposition of 0 Shares; and has shared power to dispose
or direct the disposition of 1,500,000 Shares.

     HMCNY specifically disclaims beneficial ownership in the Shares reported
herein except to the extent of its pecuniary interest therein.

     (a, b) As of the date hereof, HMC may be deemed to be the beneficial owner
of 5,933,262 Shares, constituting 22.3% of the Shares of the Issuer, based upon
26,564,206 Shares outstanding as of September 21, 2006.

     HMC has the sole power to vote or direct the vote of 0 Shares; has the
shared power to vote or direct the vote of 5,933,262 Shares; has sole power to
dispose or direct the disposition of 0 Shares; and has shared power to dispose
or direct the disposition of 5,933,262 Shares.

     HMC specifically disclaims beneficial ownership in the Shares reported
herein except to the extent of its pecuniary interest therein.

(a, b) As of the date hereof, Philip Falcone may be deemed to be the beneficial
owner of 5,933,262 Shares, constituting 22.3% of the Shares of the Issuer, based
upon 26,564,206 Shares outstanding as of September 21, 2006.

     Mr. Falcone has the sole power to vote or direct the vote of 0 Shares; has
the shared power to vote or direct the vote of 5,933,262 Shares; has sole power
to dispose or direct the disposition of 0 Shares; and has shared power to
dispose or direct the disposition of 5,933,262 Shares.

Mr. Falcone specifically disclaims beneficial ownership in the Shares reported
herein except to the extent of his pecuniary interest therein.

(a, b) As of the date hereof, Raymond J. Harbert may be deemed to be the
beneficial owner of 5,933,262 Shares, constituting 22.3% of the Shares of the
Issuer, based upon 26,564,206 Shares outstanding as of September 21, 2006.

     Mr. Harbert has the sole power to vote or direct the vote of 0 Shares; has
the shared power to vote or direct the vote of 5,933,262 Shares; has sole power
to dispose or direct the disposition of 0 Shares; and has shared power to
dispose or direct the disposition of 5,933,262 Shares.

Mr. Harbert specifically disclaims beneficial ownership in the Shares reported
herein except to the extent of his pecuniary interest therein.

(a, b) As of the date hereof, Michael D. Luce may be deemed to be the beneficial
owner of 5,933,262 Shares, constituting 22.3% of the Shares of the Issuer, based
upon 26,564,206 Shares outstanding as of September 21, 2006.

     Mr. Luce has the sole power to vote or direct the vote of 0 Shares; has the
shared power to vote or direct the vote of 5,933,262 Shares; has sole power to
dispose or direct the disposition of 0 Shares; and has shared power to dispose
or direct the disposition of 5,933,262 Shares.

Mr. Luce specifically disclaims beneficial ownership in the Shares reported
herein except to the extent of his pecuniary interest therein.

(c) The trading dates, number of Shares purchased and sold and price per share
for all transactions in the Shares by the Reporting Persons are set forth in
Exhibit B.

--------------------------------------------------------------------------------
Item 6.  Contracts, Arrangements, Understandings or Relationships with Respect
         to Securities of the Issuer.

         N/A.

--------------------------------------------------------------------------------
Item 7.  Material to be Filed as Exhibits.

Exhibit A: Agreement between the Reporting Persons to file jointly
Exhibit B: Schedule of Transactions in the Shares of the Issuer



                                   SIGNATURE



     After  reasonable  inquiry and to the best of my  knowledge  and belief,  I
certify that the information  set forth in this statement is true,  complete and
correct.

Harbinger Capital Partners Master Fund I, Ltd.
By: Harbinger Capital Partners Offshore Manager, L.L.C.
By: HMC Investors, L.L.C., Managing Member

By: /s/ Joel B. Piassick
--------------------------

Harbinger Capital Partners Offshore Manager, L.L.C.*
By: HMC Investors, L.L.C., Managing Member

By: /s/ Joel B. Piassick
--------------------------

HMC Investors, L.L.C.*

By: /s/ Joel B. Piassick
--------------------------

Harbinger Capital Partners Special Situations Fund, L.P.
By: Harbinger Capital Partners Special Situations GP, LLC
By: HMC - New York, Inc., Managing Member

By: /s/ Joel B. Piassick
--------------------------

Harbinger Capital Partners Special Situations GP, LLC*
By: HMC - New York, Inc., Managing Member

By: /s/ Joel B. Piassick
--------------------------

HMC - New York, Inc.*

By: /s/ Joel B. Piassick
--------------------------

Harbert Management Corporation*

By: /s/ Joel B. Piassick
--------------------------

/s/ Philip Falcone*
--------------------------
Philip Falcone

/s/ Raymond J. Harbert*
--------------------------
Raymond J. Harbert

/s/ Michael D. Luce*
--------------------------
Michael D. Luce

October 13, 2006

Attention.  Intentional  misstatements  or omissions of fact constitute  federal
criminal violations (see 18 U.S.C. 1001).






                                                                       Exhibit A

                                    AGREEMENT


The undersigned agree that this Schedule 13D, Amendment No. 4 dated October 13,
2006 relating to the Voting Common Stock of Skyterra Communications, Inc. shall
be filed on behalf of the undersigned.

Harbinger Capital Partners Master Fund I, Ltd.
By: Harbinger Capital Partners Offshore Manager, L.L.C.
By: HMC Investors, L.L.C., Managing Member

By: /s/ Joel B. Piassick
--------------------------

Harbinger Capital Partners Offshore Manager, L.L.C.*
By: HMC Investors, L.L.C., Managing Member

By: /s/ Joel B. Piassick
--------------------------

HMC Investors, L.L.C.*

By: /s/ Joel B. Piassick
--------------------------

Harbinger Capital Partners Special Situations Fund, L.P.
By: Harbinger Capital Partners Special Situations GP, LLC
By: HMC - New York, Inc., Managing Member

By: /s/ Joel B. Piassick
--------------------------

Harbinger Capital Partners Special Situations GP, LLC*
By: HMC - New York, Inc., Managing Member

By: /s/ Joel B. Piassick
--------------------------

HMC - New York, Inc.*

By: /s/ Joel B. Piassick
--------------------------

Harbert Management Corporation*

By: /s/ Joel B. Piassick
--------------------------

/s/ Philip Falcone*
--------------------------
Philip Falcone

/s/ Raymond J. Harbert*
--------------------------
Raymond J. Harbert

/s/ Michael D. Luce*
--------------------------
Michael D. Luce

*The Reporting Persons disclaim beneficial ownership in the shares reported
herein except to the extent of their pecuniary interest therein.


                                                                     Exhibit B

                     Transactions in the Voting Common Stock
                     ---------------------------------------

         TRANSACTIONS BY HARBINGER CAPITAL PARTNERS MASTER FUND I, LTD.

        Date of              Number of Shares
      Transaction            Purchase/(Sold)              Price per Share
      -----------            ---------------              ---------------

        10/10/06                1,073,214                      13.15
        10/12/06                  100,000                      12.95
        10/12/06                   30,000                      12.95

    TRANSACTIONS BY HARBINGER CAPITAL PARTNERS SPECIAL SITUATIONS FUND, L.P.

        Date of             Number of Shares
      Transaction           Purchase/(Sold)               Price per Share
      -----------           ---------------               ---------------

        10/10/06                1,500,000                      13.15


SK 03773 0003 711425