event of salvage, towage or other assistance being rendered to the vessel hereby insured, by any vessel belonging in part or in whole to the same owners, it is hereby agreed that the value of such services (without regard to the common ownership of the vessels) shall be ascertained by arbitration in the manner hereinafter provided for under the collision clause, and the amount so awarded, so far as applicable to the interest hereby insured, shall constitute a charge under this policy.
"And it is further agreed, that if the ship hereby insured shall come into collision with any other ship or vessel, and the assured shall in consequence thereof become liable to pay, and shall pay, by way of damages to any other person or persons, any sum or sums not exceeding in respect of any one such collision the value of the ship hereby insured, we, the assurers, will pay the assured such proportion of three-fourths of such sum or sums so paid as our subscriptions hereto bear to the value of the ship hereby insured. And in cases where the liability of the ship has been contested, with the consent, in writing, of a majority of the underwriters on the hull and/or machinery (in amount), we will also pay a like proportion of three-fourths part of the costs thereby incurred or paid; but when both vessels are to blame, then, unless the liability of the owners of one or both of such vessels becomes limited by law, claims under the collision clause
