单项选择题

How should signal flares be used after you have abandoned ship and are adrift in a liferaft?（）.

A.Immediately use all the signals at once
B.Use all the signals during the first night
C.Employ a signal every hour after abandoning ship until they are gone
D.Use them only when you are aware of a ship or plane in the area

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单项选择题

Generally，what is used to inflate liferafts?（）.

A.non-toxic gas
B.Oxygen
C.Hydrogen
D.Helium

单项选择题

Each liferaft，which does not have an indicated maximum stowage height indicated on the liferaft，must be（）.

A.limited to carry no more than 10 persons
B.stowed not more than 59 feet above the lightest waterline
C.stowed in quick release racks
D.inspected every six months

单项选择题

Each lifebuoy shall be marked in block capitals of the Roman alphabet with（）of the ship.

A.the call sign and name
B.the official number and name
C.the port of registry and name
D.the port of registry and official number