单项选择题 A vessel has a charter party for one voyage to carry a full load of manganese from Durban，South Africa，to Baltimore，Maryland，at a stipulated rate per ton. Which type of contract is involved? （）.

单项选择题 A sum of money paid by the Shipowner to Charterer for completing loading or discharging a cargo in less time than that stipulated in Charter Party as laydays．It is（）.

单项选择题 A right to withdraw a vessel（）the service of the Charterers failing the punctual and regular payment of the hire cannot be defeated by later tender of the hire.