單項(xiàng)選擇題It is an（）condition precedent in every voyage charter-party that the ship shall proceed on the voyage without departure from her proper course.

A.implemented
B.implied
C.impossible
D.improper


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1.單項(xiàng)選擇題In stopping distances of vessels，head reach can best be described as the（）.

A.difference between the vessel's speed through the water at any instant and the new speed ordered on the telegraph
B.distance the vessel has actually run through the water since a change of speed was ordered
C.distance the vessel will run between taking action to stop her and being stationary in the water
D.speed at which a vessel should proceed to ensure that she will run a predetermined distance，once her engines have been stopped

2.單項(xiàng)選擇題If you do NOT understand the course or intention of an approaching vessel you should sound （）.

A.one short blast
B.one prolonged blast
C.not less than five short blasts
D.not less than five prolonged blasts

4.單項(xiàng)選擇題If a ship is proceeding towards the magnetic equator，the uncorrected deviation due to permanent magnetism（）.

A.increases
B.remains the same
C.decreases
D.is unimportant and may be neglected

5.單項(xiàng)選擇題How does an icebreaker normally free a ship which has become beset while navigating independently?（）

A.By backing down the track and cutting out ice on either bow
B.By approaching from the stern and crossing ahead at an angle of 20°to 30°to the beset ship's course
C.By overtaking the beset ship，running ahead and then backing down the track to the beset vessel
D.By approaching the vessel from astern and towing the beset vessel stern first