A.A flashing amber light
B.A fixed red light
C.A white flag raised and lowered vertically
D.A flashing white light
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A.at all times
B.in the bottom return mode
C.in the volume reverberation mode
D.only when there is no current
A.heavy
B.easily damaged
C.affected by temperature
D.costly relative to the strength ratio
A.stopper
B.screen
C.filter
D.restrictor
A.rising warm air
B.proximity to a low pressure area
C.inward spiraling circulation
D.clear dry weather
A.Has there been
B.Have there been
C.Has there
D.Have there
最新試題
Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.
Cargo transfer operations on a tank vessel need NOT be stopped when（）.
Between 1830 hrs and 1850 hrs this day，strong gusty winds（）by my vessel，in consequence of which the vessel’s four mooring lines were broken.
A fire pump may be used for other purposes if（）.
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（）.
How could lashing gear used aboard Ro-Ro vessels be stowed when not in use? （）
A safe fuel system must（）.
A large metallic device，mounted directly in the piping (usually located at the dock near the point where the vapor hose is attached)，designed to prevent the passage of a rapidly moving flame through the piping is called a（）.
A head-on situation at night is one in which you see dead ahead a vessel showing（）.
A green buoy has a yellow triangle on it. This is a(n)（）.