单项选择题

A.crossB.crossingC.crossedD.crossesMariners are reminde……

Mariners are reminded that they should proceed in the general direction indicated by the arrows or，if（）a lane，they should do so as nearly as practicable at right angles to it.

A.cross
B.crossing
C.crossed
D.crosses

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单项选择题Mainly east 3 or 4 partly cloudy to overcast occasional rain（）slowly south moderate or good.

A.spreading
B.proceeding
C.bounding for
D.going to

单项选择题Large vessel leaving. Keep clear（）approach channel.

A.off
B.reach
C.from
D.of

单项选择题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

单项选择题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

单项选择题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