单项选择题
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（）.
A.Minimum speed estimate
B.Maximum speed estimate
C.Average speed estimate
D.A running fix should not be used under these conditions
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You are making tow.A loaded，open-hopper barge with independent tanks has placards，with alternating red and white quadrants，located at each side and end.You inspect the barge and find slight traces of water in the wing voids due to condensation.What（）.
A.Refuse to accept the barge until all wing voids are dry
B.Accept the barge and when weather conditions permit run with the wing voids open to ventilate the spaces
C.Accept the barge and periodically check the wing voids
D.Return the barge to the fleet and depart without the barge -
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You are entering an east coast port and see a buoy with a yellow triangle painted on it.This indicates（）.
A.you are in the vicinity of the ICW
B.the buoy is a special mark
C.the buoy is off station
D.the buoy designates a sharp turn in the channel -
单项选择题
You are drifting in a locale where there is no current．As a rule，your vessel will lie（）.
A.Bow to the wind
B.Beam to the wind
C.Stern to the wind
D.With the wind on the quarter
