A.wingdam
B.towhead
C.cutoff
D.landwall
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A.true north
B.magnetic north
C.the vessel's beam
D.the vessel's head
A.white light whose characteristic is Morse (A)
B.group-occulting white light
C.composite group-flashing (2 + 1) white light
D.composite group-flashing (2 + 1) red or green light
A.lettered
B.spherical
C.showing a white light
D.All of the above
A.the equator
B.a great circle
C.a small circle
D.a meridian
A.the equator
B.a loxodromic curve
C.a small circle
D.a meridian
最新試題
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
From your position you observe a rotating white and green light to the north. This light is most likely（）.
Buoys which mark isolated dangers are painted with alternating（）.
An orange and white buoy with a rectangle on it displays（）.
A vessel is（）when she is not at anchor，made fast to the shore，or aground.
A white buoy with an orange rectangle on it displays（）.
An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
A white buoy with a blue band is（）.
Buoys which mark dredging areas are painted（）.