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? （）

How does an inert gas system on a tanker function to prevent explosions in cargo tanks? （）

A seaman is entitled by law to a release from Foreign Articles when（）.

A signal indicating zone time is preceded with the letter（）.

A single barometric pressure reading of 28.60 indicates（）.

A set of clamps that are latched onto the drill pipe to allow the driller to raise or lower the drill string out of or into the hole are the（）.

A Master would be well advised to file a note of protest if（）.

A set of interior steps on a ship leading up to a deck from below is know as（）.

A single line of position combined with a dead-reckoning position results in a(n)（）.

A semisubmersible which flops between forward and aft angles of trim is likely to have（）.