单项选择题
A.pay away the chain B.take in the chain C.check up the chain D.take a strain on the chain
In reading a weather map, closely spaced pressure gradi...
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
In restricted visibility, a vessel which detects by rad...
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
In revised editions of admiralty charts the（）are correc...
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
