單項選擇題When vessel enters thick fog, she should sound（）every two minutes in accordance with the rules.

A.one short blast
B.one prolonged blast
C.two short blasts


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1.單項選擇題When there is not a chief officer on board,（）should keep and write up the ship’s logbook.

A.the assistant officer
B.the captain
C.the officer on duty 
D.the third officer

2.單項選擇題Which one of two crossing power-driven vessels has the right of way in a fog?（）.

A.Both vessels
B.Neither vessel
C.The stand-on vessel
D.The giving-way vessel

3.單項選擇題Write down your name（）,please.

A.in numbers
B.with marks
C.in block letters
D.with s mbols

4.單項選擇題You are running into danger,（）.

A.shallow water ahead of you
B.submerged wreck ahead of you
C.risk of collision imminent
D.A, B, C are all right

5.單項選擇題Your figure doesn’t turn（）100% correct.

A.in
B.on
C.out
D.about