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
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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
A.great circle
B.loxodromic curve
C.small circle
D.gnomonic curve
最新試題
Except for N-S courses，and E-W courses on the equator，a great circle track between two points，when compared to a rhumb line track between the same two points，will（）.
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
A mid-channel buoy，if lighted，will show a（）.
Buoys which mark dredging areas are painted（）.
A white buoy with an orange rectangle on it displays（）.
A yellow buoy may exhibit a(n)（）.
Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
Branford reef is（）.
A vessel is（）when she is not at anchor，made fast to the shore，or aground.