單項選擇題Uncharted lights, fog signals and radar beacon transmissions may be（）near the station.

A.encountered
B.met
C.contacted
D.seen


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1.單項選擇題Unless it is unavoidable do not jump from a place higher than 5 meters into the water. Try to minimize the shook of sudden cold immersion. When should the said caution be taken into account?（）.

A.The mariners try to put out fire on board of vessel
B.The people on board try to survive themselves from a ship in perils
C.The salvors take actions to rescue the survivors at sea
D.The pilot come on board from his boat in bad weather

3.單項選擇題Vessels are advised（）clear of this area.

A.keep
B.keeping
C.to keep
D.to keeping

5.單項選擇題Vessels should not anchor or trawl in the vicinity of pipelines and are（）.in the pipeline area shown on the chart.

A.prohibit to anchor
B.prohibited to anchor
C.not to anchor
D.prohibited from anchoring