Final Voyage Should the vessel be on her voyage towards the port of redelivery at the time of payment of hire is due,payment of hire shall be made for such length of time as Owners and Charterers may agree upon as being estimated time necessary to complete the voyage,less any disbursements made or expected to be made or expenses incurred or expected to be incurred by Charterers for owners account and less the estimated amount of bunker fuel remaining at the termination of the voyage and when the vessel is redelivered any overpayment shall be refunded by the owners or underpayment paid by Charterers