A.the equator
B.a great circle
C.a small circle
D.a meridian
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A.the equator
B.a loxodromic curve
C.a small circle
D.a meridian
A.Great circle
B.Equator
C.Small circle
D.Meridian
A.great circle
B.loxodromic curve
C.small circle
D.gnomonic curve
A.be green in color
B.have an even number
C.be left to port when entering from seaward
D.be cylindrical in shape
A.fixed red light
B.Morse (A) white light
C.green light
D.flashing red light
最新試題
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
From your position you observe a rotating white and green light to the north. This light is most likely（）.
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
An orange and white buoy with a rectangle on it displays（）.
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
A parallel of latitude other than the equator is a（）.
Branford reef is（）.
An orange and white buoy marking a danger area will have what symbol on it?（）
A mid-channel buoy，if lighted，will show a（）.
Buoys which mark dredging areas are painted（）.