单项选择题
In reading a weather map, closely spaced pressure gradient lines would indicate（）.
A.high winds
B.high overcast clouds
C.calm or light winds
D.fog or steady rain
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相关考题
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单项选择题
In restricted visibility, a vessel which detects by radar alone the presence of another vessel shall determine if a close quarters situation is developing or risk of collision exists. If so, she shall（）.
A.sound the danger signal
B.when taking action, make only course changes
C.avoid altering course toward a vessel abaft the beam
D.All of the above -
单项选择题
In revised editions of admiralty charts the（）are corrected first.
A.smaller scales
B.larger scales
C.smaller scales and larger scales
D.moderate scales -
单项选择题
In the doldrums you can expect（）.
A.steady, constant winds
B.frequent rain showers and thunderstorms
C.steep pressure gradients
D.low relative humidity
