单项选择题 A vessel would be referred to as “stiff” when the weight of the cargo is（）.

单项选择题 A vessel transferring cargo while underway is classified by the Rules as a vessel（）.

单项选择题 A vessel loads 5000 tons of manganese ore. The railroad cars that brought the ore to the vessel were previously loaded with iron ore so the ore is contaminated. The agent requests the Master to sign a Clean Bill of Lading and in return the shipper will give him a Letter of Indemnity. What is the best procedure to follow? （）