A.true north
B.magnetic north
C.the vessel's beam
D.the vessel's head
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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
A.Great circle
B.Equator
C.Small circle
D.Meridian
最新試題
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
How would you pass a red buoy in the maritime buoyage system “A”? （）
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
Buoys which mark dredging areas are painted（）.
A rock and sand structure extending from the bank of the river toward the channel is known as a（）.
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
A yellow buoy may exhibit a(n)（）.
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
A spherical buoy may be（）.