Exhibit 10.1

                          AMENDMENT TO RIGHTS AGREEMENT

     This Amendment to Rights Agreement, dated as of September 25, 2006 (this
"Amendment"), between Maritrans Inc., a Delaware corporation (the "Company"),
and American Stock Transfer & Trust Company (the "Rights Agent").

                                   WITNESSETH:

     WHEREAS, the Company and the Rights Agent constitute all of the parties to
that certain Rights Agreement, dated as of August 1, 2002 (the "Rights
Agreement"), and desire to amend the Rights Agreement as set forth herein.

     NOW, THEREFORE, in consideration of the premises and of the mutual
covenants and agreements herein contained, and intending to be legally bound
hereby, and pursuant to the Rights Agreement and in accordance with Section 26
thereof, the parties hereto do hereby agree as follows (capitalized terms used
but not defined herein have the meanings ascribed to such terms in the Rights
Agreement):

1.   Amendments to the Rights Agreement.

     (a) The Rights Agreement shall be amended by adding the following as
Section 34 thereof:

     "Section 34. Notwithstanding anything to the contrary in this Agreement or
     the Rights Certificates, with respect to the Agreement and Plan of Merger
     substantially in the form attached hereto as Exhibit C (the "Merger
     Agreement"), (i) none of the execution or announcement of, or consummation
     of the Merger (as defined therein) or the related transactions contemplated
     by the Merger Agreement, shall result or be deemed to result in a
     Distribution Date, Stock Acquisition Date or Triggering Event, and none of
     Overseas Shipholding Group, Inc., Marlin Acquisition Corporation or any of
     their Affiliates or Associates, individually or collectively, shall
     constitute or be deemed to constitute an Acquiring Person or a Principal
     Party as a result of such execution, announcement or consummation, (ii) the
     Company shall not be obligated to provide any notice pursuant to Section
     24(b) as a result of the execution or announcement of, or consummation of
     the Merger or the related transactions contemplated by, the Merger
     Agreement and (iii) upon consummation of the Merger in accordance with the
     terms of the Merger Agreement, all Rights shall be deemed to have been
     redeemed in full and all rights thereunder extinguished."

     (b) New Exhibit C is hereby added to the Rights Agreement in the form set
forth as Exhibit A hereto.



2.   Miscellaneous.

     (a) The laws of the State of Delaware shall govern the validity,
interpretation, construction, performance, and enforcement of this Agreement,
excluding the choice of laws provisions of the State of Delaware.

     (b) Except as modified herein, all other terms and provisions of the Rights
Agreement (including the Exhibits thereto) are unchanged and remain in full
force and effect.

     (c) This Amendment may be executed in counterparts, each of which shall be
deemed an original, but all of which taken together shall constitute one and the
same instrument. This Amendment shall become effective when each party to this
Amendment shall have received a counterpart hereof signed by the other party to
this Amendment.

     (d) This Amendment shall be binding upon any permitted assignee,
transferee, successor or assign to any of the parties hereto.

     (e) If any term, provision, covenant or restriction of this Amendment is
held by a court of competent jurisdiction or other authority to be invalid, void
or unenforceable, the remainder of the terms, provisions, covenants and
restrictions of this Amendment, and the Rights Agreement, shall remain in full
force and effect and shall in no way be affected, impaired or invalidated.

     (f) The officer of the Company executing this Amendment on behalf of the
Company hereby certifies on behalf of the company that this Amendment complies
with Section 26 of the Rights Agreement.

     (g) In all respects not inconsistent with the terms and provisions of this
Amendment, the Rights Agreement is hereby ratified, adopted, approved and
confirmed. In executing and delivering this Amendment, the Rights Agent shall be
entitled to all the privileges and immunities afforded to the Rights Agent under
the terms and conditions of the Rights Agreement.

                            [Signature Page Follows]



     IN WITNESS WHEREOF, the parties have caused this Amendment to be duly
executed by their duly authorized representatives as of the date first written
above.

                                        MARITRANS INC.


                                        By: /s/ Jonathan P. Whitworth
                                            ------------------------------------
                                        Name: Jonathan P. Whitworth
                                        Title: Chief Executive Officer


                                        AMERICAN STOCK TRANSFER & TRUST COMPANY


                                        By: /s/ Herbert J. Lemmer
                                            ------------------------------------
                                        Name: Herbert J. Lemmer
                                        Title: Vice President