单项选择题

Before any loading takes place any signs of the previous cargo should do（）.

A.kept
B.removed
C.replaced
D.recycled

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单项选择题

Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）

A.coastal breeze
B.sea breeze
C.land breeze
D.mistral

单项选择题

Which of the following shall not the officers in charge of the navigational watch do?（）

A.continue to be responsible for the safe navigation of the ship
B.Leave the bridge
C.Keep the watch on the bridge
D.Use any available navigational aids necessary to ensure that the ship follows the planned course

单项选择题

The helm command PORT TWENTY means（）.

A.change course twenty degrees to the left
B.put the rudder left twenty degrees
C.put the rudder hard left for the first twenty degrees of swing
D.put the rudder left twenty degrees and then ease back as the vessel starts swinging