A.by
B.with
C.on
D.in
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A.cable areas
B.dumping grounds
C.fish trap areas
D.precautionary areas
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
A.After boarding the pilot
B.After the pilot leaving the ship
C.After the pilot going on board
D.After taking the pilot
A.high barometric pressure
B.jet stream
C.storm surge
D.torrential rains
A.on
B.of
C.in
D.for
最新試題
During daylight savings time the meridian used for determining the time is located farther （）.
The Earth has the shape of a(n) （）.
Areas enclosed by a long and short dashed magenta line indicate （）.
For full information regarding the current circulation of the Indian Ocean,（） Sailing Direction,Current Atlas,etc.
A pilot vessel on pilotage duty at night will show sidelights and a sternlight （）.
Due to lapse of time the risk in these areas to surface navigation is now considered （）than the ordinary risks of navigation，but a very real risk still exists with regard to anchoring，fishing or any form of submarine or seabed activity.
Clearance gauges at bridges indicate （）.
As these features are not all charted，special caution should be exercised （） vessels navigating in the vicinity.
Conditions for crossing a rough bar are usually best at （）.
Information on the operating times and characteristics of foreign radiobeacons can be found in which publication? （）