单项选择题
A head-on situation at night is one in which you see dead ahead a vessel showing（）.
A.one sidelight
B.one sidelight and a masthead light
C.one sidelight and two masthead lights
D.both sidelights of a vessel and her masthead light(s)
点击查看答案&解析
相关考题
-
单项选择题
A hand held instrument used to measure distances between objects and the ship is a（）.
A.vernier
B.psychrometer
C.hygrometer
D.stadimeter -
单项选择题
A green buoy has a yellow triangle on it. This is a(n)（）.
A.information or regulatory buoy that has lateral significance
B.buoy that is off-station and is marked to warn mariners of its wrong position
C.dual purpose marking used where the ICW and other waterways coincide
D.buoy that was set in error and will be replaced with a red nun buoy -
单项选择题
A frame with two，or sometimes four，arms through which are threaded the guidelines and which is used to keep the drill stem and bit in line with the center opening in the temporary guide base is the（）.
A.drill stem guide
B.guide frame
C.drill string frame
D.casing guide
