单项选择题

The forward movement of a ship in one revolution of its propeller is measured by（）.

A.advance
B.head reach
C.pitch
D.transfer

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单项选择题

The distance that a ship moves forward with each revolutionof its propeller，if there is no slip，is called（）.

A.advance
B.head reach
C.pitch
D.transfer

单项选择题

The distance between rivets in a row is known as the（）.

A.arm
B.pitch
C.gage
D.rivet distance

单项选择题

The BEST way to steer a twin-screw vessel if you lose your rudder is by using（）.

A.one engine and a steering oar
B.both engines at the same speed
C.one engine at a time
D.one engine running at reduced speed and controlling the vessel with the other