A.byB.withC.onD.inAs these features are not all charted……

单项选择题Areas enclosed by a long and short dashed magenta line indicate （）.

A.cable areas
B.dumping grounds
C.fish trap areas
D.precautionary areas

单项选择题An occulting light is one in which （）.

A.the period of darkness exceeds the period of light
B.there is only a partial eclipse of the light
C.the periods of light and darkness are equal
D.the period of light exceeds the period of darkness

单项选择题AFTER DROPPING THE PILOT means （）.

A.After boarding the pilot
B.After the pilot leaving the ship
C.After the pilot going on board
D.After taking the pilot

单项选择题Above-normal tides near the center of a hurricane maybe caused by the （）.

A.high barometric pressure
B.jet stream
C.storm surge
D.torrential rains

单项选择题A vessel not to impede the passage of another vessel is not relieved （） taking collision-avoiding action.

A.on
B.of
C.in
D.for