It is dangerous for vessels without the operational radar（）the estuary.

Which of the following is not a form of precipitation?（）

What is it called when it is possible to ignite the vapour above the oil?（）

Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.

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

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

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

Bales close to the deckhead should be covered to prevent（）.

（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.

What is a CORRECT reply to a pilot’s request, How’s your heading?（）