Exhibit 4.3

                               WRITTEN CONSENT OF

                        SUPERMAJORITY HOLDERS OF SERIES B

                        CONVERTIBLE REDEEMABLE PREFERRED

                              STOCK OF ORBCOMM INC.

                                October 11, 2006

              The undersigned, collectively constituting the Supermajority
Preferred Holders (as defined in the Certificate of Incorporation referenced
below) of the holders of Series B Convertible Redeemable Preferred Stock (the
"Series B Preferred Stock") of ORBCOMM Inc., a Delaware Corporation (the
"Company"), in accordance with Section 242 of the general corporation law of the
State of Delaware and pursuant to Article Fourth - Series A and Series B
Preferred Stock - Section (4)(b)(iii) of the Company's Third Amended and
Restated Certificate of Incorporation, as amended (the "Certificate of
Incorporation"), hereby irrevocably consent, subject to satisfaction of each of
the conditions and provisions set forth below, to the taking of the following
action and direct that this consent be filed in the minute books of the Company:

              RESOLVED that each share of Series A Preferred Stock (as defined
in the Certificate of Incorporation) and Series B Preferred Stock of the Company
shall automatically be converted into shares of Common Stock (as defined in the
Certificate of Incorporation) at the Series A Conversion Price (as defined in
the Certificate of Incorporation) for such Series A Preferred Stock then in
effect and the Series B Conversion Price (as defined in the Certificate of
Incorporation) for such Series B Preferred Stock then in effect immediately upon
the closing of the initial public offering by the Company of its shares of
Common Stock pursuant to the Company's Registration Statement (Registration No.
333-134088) filed with the Securities and Exchange Commission (the "Initial
Public Offering").

              The effectiveness of this written consent shall be subject to the
following conditions:

              a.   If the offering price per share in the Initial Public
                   Offering is less than $12.50 per share, payment by the
                   Company at the closing of the Initial Public Offering to the
                   holders of Series B Preferred Stock of an amount per share
                   equal to the difference between (i) $6.045 and (ii) the
                   quotient of (A) the offering price per share in the Initial
                   Public Offering divided by (B) 2.114;




              b.   the offering price per share in the Initial Public Offering
                   being no less than $11.00 per share and no greater than
                   $12.77 per share; and

              c.   the closing of the Initial Public Offering.

              For the avoidance of doubt, if any of the conditions set forth
above is not satisfied at the closing of the Initial Public Offering (or if the
Initial Public Offering is not consummated on or before December 31, 2006), then
this written consent shall be void and of no further force and effect (and the
shares of Series A Preferred Stock and Series B Preferred Stock shall not be
converted into Common Stock pursuant to this written consent).

              This written consent of the holders of Series B Preferred Stock
may be executed in counterparts with the same effect as if the signatures were
shown on one document.

Dated: October 11, 2006



PCG Satellite Investments, LLC

By:     CALPERS/PCG Corporate Partners LLC,
        A Delaware limited liability company

Its:    Managing Member

        By:       PCG Corporate Partners Investments LLC
        Its:      Manager

            By:   PCG Corporate Group Holdings, LLC
            Its:  Managing Member

                  By: /s/ Timothy Kelleher
                     ------------------------------
                  Name: Timothy Kelleher
                  Its:  Managing Member


7,836,228 Shares of Series B Preferred Stock



                     (Signature Pages Continue on Next Page)


                                       2





Ridgewood Satellite LLC

By:     Ridgewood Venture Management Corporation
Its:    Manager

        By: /s/ Robert Gold
            ------------------------------
        Name:  Robert Gold
        Title: President

2,810,696 Shares of Series B Preferred Stock

MH Investors Satellite LLC

By: /s/ Ronald Gerwig
   ---------------------------------------
Name:  Ronald Gerwig
Title: Secretary

3,722,084 Shares of Series B Preferred Stock

OHB Technology A.G.

By: /s/ Marco Fuchs
   ---------------------------------------
Name:  Marco Fuchs
Title: Chief Executive Officer

997,270 Share of Series B Preferred Stock

Northwood Ventures LLC

By: /s/ Peter Schiff
   ---------------------------------------
Name:  Peter Schiff
Title: President

416,873 Shares of Series B Preferred Stock

Northwood Capital Partners LLC

By: /s/ Peter Schiff
   ---------------------------------------
Name:  Peter Schiff
Title: President

79,404 Shares of Series B Preferred Stock


                                       3



346 Hillcrest F&F Partners LLC

By: /s/ Jerome B. Eisenberg
   ---------------------------------------
Name:  Jerome B. Eisenberg
Title: Managing Member

248,138 Shares of Series B Preferred Stock




                                       4