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Exhibit 24

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Jerome B. Eisenberg, Marc Eisenberg and
Christian G. Le Brun, and each of them singly, true and lawful
attorneys-in-fact and agents, with full power to them (including the full power
of substitution and resubstitution), to sign for him and in his name, place and
stead, in the capacity or capacities set forth below, (1) the Annual Report on
Form 10-K for the fiscal year ended December 31, 2007 to be filed by ORBCOMM
Inc. (the Company) with the Securities and Exchange Commission (the
Commission) pursuant to Section 13 of the Securities Exchange Act of 1934, as
amended, and (2) any amendments to the foregoing Annual Report, and to file the
same, with all exhibits thereto and other documents in connection therewith,
with the Commission, granting unto said attorneys-in-fact and agents and each
of them, full power and authority to do and perform each and every act and
thing requisite and necessary to be done in connection therewith, as fully to
all intents and purposes as he might or could do in person, hereby ratifying
and confirming all that said attorneys-in-fact and agents or any of them, or
their or his substitute or substitutes, may lawfully do or cause to be done by
virtue hereof.

|                                             |  |                                                                                                   |  |               
|-------------------------------------------- |  | ------------------------------------------------------------------------------------------------- |  | --------------
|Signature                                    |  | Title                                                                                             |  | Date          
|                                             |  |                                                                                                   |  |               
|/s/ Jerome B. EisenbergJerome B. Eisenberg   |  | Chairman of the Board and Chief
Executive Officer (principal
executive officer)                   |  | March 12, 2008
|                                            
|/s/ Didier DelepineDidier Delepine           |  | Director                                                                                          |  | March 12, 2008
|                                            
|/s/ Marc EisenbergMarc Eisenberg             |  | Director                                                                                          |  | March 17, 2008
|                                            
|/s/ Marco FuchsMarco Fuchs                   |  | Director                                                                                          |  | March 14, 2008
|                                            
|/s/ Hans E. W. HoffmannHans E.W. Hoffmann    |  | Director                                                                                          |  | March 12, 2008
|                                            
|/s/ John MajorJohn Major                     |  | Director                                                                                          |  | March 13, 2008
|                                            
|/s/ Gary H. RitondaroGary H. Ritondaro       |  | Director                                                                                          |  | March 16, 2008
|                                            
|/s/ Robert G. CostantiniRobert G. Costantini |  | Executive Vice President and
Chief Financial Officer (principal
financial and accounting officer) |  | March 17, 2008