In consideration of your paying us the above claim amount, we hereby agree to transfer to you all our rights, title and interest in said subject matter insured by the said policy, and to execute all documents whicg may be necessary for authorizing you to make use of our name. And we undertake to render you every assistance in any action or actions you may be advised to take against the owners of the vessel mentioned above or any other persons in respect of this loss and if called upon, we will undertake such action or proceedings or your behalf, you holding us harmless against all costs, expenses, and charges of said action oractions.