______ directly affect the fitness a

单选题 ______ directly affect the fitness and ability of a seafarer to perform watchkeeping duties.

A、 Smoking

B、 Drug and alcohol abuse

C、 Fruit

D、 Vegetables

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单选题 The helm command PORT TWENTY means____ .

A、change course twenty degrees to the port

B、put the rudder port twenty degrees

C、put the rudder hard a port for the first twenty degrees of swing

D、put the rudder port twenty degrees and then ease back as the vessel starts swinging

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单选题 ____ is placed in the front of the ship under the water, which eases berthing or maneuvering sideways at slow speed.

A、The bulbous bow

B、The anchor

C、The bow thruster

D、The propeller

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单选题 The helm command NOTHING TO PORT means do not____ .

A、use left rudder

B、steer to left of the ordered

C、steer to right of the ordered

D、leave any bouys on the port side

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单选题 MIDSHIPS refers to rudder to be held____ .

A、in position to starboard

B、in position to port

C、in position to anywhere

D、in position fore and aft

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单选题 ____ is the device fitted in the forward bottom part of the ship enabling the ship to swing the head in the desired direction.

A、Bow thruster

B、Rudder

C、Propeller

D、Emergency generator

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单选题 Ship's steering gear refers to ____.

A、cargo handling machines

B、deck winches and derricks

C、engine-room tools

D、course controlling system

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单选题 ____is the big size plating behind the propeller to alter the direction of the thrust

A、

Radar

B、

derrick

C、

Rudder

D、

Bow thruster

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单选题 When should you use emergency steering?

A、When entering and leaving a harbour

B、When hand-steering is out of use

C、When ordered by captain or pilot

D、When meeting a vessel in an emergency

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