A.one short blast
B.one prolonged blast
C.not less than five short blasts
D.not less than five prolonged blasts
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A.clean report
B.serious deficiencies
C.clear ground
D.detention report
A.increases
B.remains the same
C.decreases
D.is unimportant and may be neglected
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
A.you can stop within your visibility range
B.you can take proper and effective action to avoid collision
C.you are traveling slower than surrounding vessels
D.no wake comes from your vessel
A.adapted to
B.used by
C.liable to
D.adaptation to
最新試題
You are sailing south on the Intracoastal Waterway（ICW）when you sight a green can buoy with a yellow square painted on it.Which of the following is TRUE（）.
In the absence of a route leading from seaward，the conventional direction of buoyage generally follows（）.
Preferred channel marks are aids to navigation which all following marks other than（）．
You are drifting in a locale where there is no current．As a rule，your vessel will lie（）.
The approach to the roads and harbor from the（）entails no difficulty.
In regions where ice conditions prevail in the winter，（）.
You are running parallel to the coast and estimate that the current is against you.In plotting a running fix using bearings from the same object on the coast，the greatest safety margin from inshore dangers will result if what speed is used to determine（）.
When liquid is free to move transversely in a tank，the effect is called（）.
You are entering an east coast port and see a buoy with a yellow triangle painted on it.This indicates（）.
Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals（）.