A.white light FL (2) and a topmark of 2 black spheres
B.occulting green light and may be lettered
C.yellow light and will be numbered
D.continuous quick white light and may be numbered
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A.interrupted quick flashing
B.composite group flashing
C.Morse (A)
D.quick flashing
A.with part of it extending above the water
B.that can be detected by water turbulence
C.that drops off sharply
D.perpendicular to the current
A.Great Circle
B.Position Line
C.Rhumb line
D.True Bearing
A.dead reckoning
B.dead weight
C.dead slow ahead
D.dead slow astern
A.difference between the true course and the compass course
B.momentum of a vessel after her engines have been stopped
C.lateral movement of a vessel downwind of her intended course
D.displacement of a vessel multiplied by her speed
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When latitude and longitude are used，these shall be expressed in（）（and decimals of a minute if necessary），north or south of the Equator and east or west of Greenwich.
The equator is（）.
Which buoy will NOT display white retro reflective material（）.
（） is a circular traffic lane used at junctions of several routes，within which traffic moves counterclockwise around a separation point or zone.
A celestial body will cross the prime vertical circle when the latitude is numerically （）.
You should plot your dead reckoning position（）.
The four standard light colors used for lighted aids to navigation are red，green，white，and （）.
When navigating a vessel，you（）.
In very high latitudes，the most practical chart projection is the（）.
Depiction of TSS's on charts uses（）as the primary color.