A.flashing amber light
B.yellow light with the same characteristics as the sternlight
C.all-round yellow light
D.yellow light with the same characteristics as the masthead light
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A.fuel oil
B.sludge
C.oil refuse
D.All of the above
A.Mayday
B.Pan
C.Safety
D.Interco
A.SOS sent three times
B.ten one-second dashes with a four-second interval between them
C.twelve four-second dashes with a one-second interval between them
D.twelve one-second dashes with a short interval between them
A.1.5 and greater
B.1.25 and greater
C.1.0 and greater
D.0.5 and greater
A.hold anchor
B.leave anchor
C.let go anchor
D.weigh anchor
最新試題
To reduce mild fever the MOST useful drug is（）.
To prevent a wooden hull from leaking you caulk it（）.
The expression FIRST MAGNITUDE is usually used to refer only to bodies of magnitude（）.
What form of ice is of land origin?（）
What does the term TO NAVIGATE WITH CAUTION mean?（）.
The vessel was drifted off from her（）due to strong wind.
The radiotelegraph alarm signal is（）.
Tripping defects in anchors frequently occur in（）.
The expression DROP ANCHOR means（）.
There is not（）depth of water around the area centered at the lighthouse.